Memory leak
•
2 likes•2,485 views
This document discusses memory leaks in Java. It provides an overview of the Java heap and generations. A memory leak occurs when objects are not removed from the heap even when no longer needed. Symptoms include frequent full garbage collections and a decreasing free heap over time. Tools like GCViewer and JProfiler can analyze garbage collection logs and heap usage to troubleshoot leaks. Best practices to avoid leaks include monitoring heap usage, freeing unnecessary objects, closing connections, and limiting session data.
Report
Share
Report
Share
Recommended
Memory Leak In java
This document discusses memory leaks in Java. It begins with an introduction explaining that in Java, memory is automatically allocated by the JVM for new objects but unused objects may not be garbage collected, causing a memory leak. The document then outlines symptoms of memory leaks like increasing memory usage and decreasing performance. It discusses tools for detecting leaks and provides tips for preventing leaks such as avoiding string concatenation, unnecessary object creation, and properly closing resources. The document concludes with a question and answer section.
Aem dispatcher – tips & tricks
The document provides tips and best practices for configuring multiple farms in AEM Dispatcher. Key points include:
- Splitting the Dispatcher configuration into multiple farms based on different caching needs, such as separate farms for DAM assets and pages.
- Configuring different caching parameters and cache folders for each farm to optimize caching behavior.
- Handling cache invalidation requests and vanity URLs across multiple farms.
- Different approaches for flushing caches from Author and multiple Publishers to Dispatchers, and avoiding race conditions.
- Bypassing the Dispatcher cache for select clients by rewriting URLs to include parameters checked by the Dispatcher configuration.
NodeJS for Beginner
This document provides an introduction to NodeJS for beginners. It discusses what NodeJS is, how it uses non-blocking I/O and event-driven architecture, and how to set up NodeJS. It also covers global objects, modules, asynchronous vs synchronous code, core NodeJS modules like filesystem and events, and how to create a basic "Hello World" NodeJS application.
Performance Tuning - Memory leaks, Thread deadlocks, JDK tools
How to identify memory leaks in java applications, thread contentions, using jdk in built tools to identify performance bottlenecks
Introduction to Node js
The document provides an introduction to building a simple web server in Node.js. It discusses organizing the code into modules, including a server module to start the web server, a routes module to route requests, and a request handlers module. It also covers basic concepts like using the http module to create a server, handling requests, and returning responses. The server currently returns the same "Hello World" response for all requests, and next steps involve routing requests to proper handlers to return the appropriate content based on the URL.
Sending Email Basics PHP
This document provides an overview of how to send emails with various headers using PHP. It discusses requirements, examples, the main email fields like sender, recipient, subject and message. It also covers additional fields like carbon copies, blind copies, reply-to, errors to, message ID. It explains how to send HTML vs text emails and attach files. The document includes code examples and links to additional tutorials.
JVM Memory Management Details
Azul Systems. Are you interested in learning what a Java Virtual Machine (JVM) is and what it does for your Java applications? This presentation will provide insight into the inner workings of a Java Virtual Machine and some drill down on what compilers and garbage collectors do, so that you don't have to worry about it while programming your Java application. In particular, you will learn about common optimizations, well established garbage collection algorithms, and what the current biggest challenge with Java scalability is today.
Java Spring framework, Dependency Injection, DI, IoC, Inversion of Control
Hi, I just prepared a presentation on Java Spring Framework, the topics covered include architecture of Spring framework and it's modules. Spring Core is explained in detail including but not limited to Inversion of Control (IoC), Dependency Injection (DI) etc. Thank you and happy learning. :)
Recommended
Memory Leak In java
This document discusses memory leaks in Java. It begins with an introduction explaining that in Java, memory is automatically allocated by the JVM for new objects but unused objects may not be garbage collected, causing a memory leak. The document then outlines symptoms of memory leaks like increasing memory usage and decreasing performance. It discusses tools for detecting leaks and provides tips for preventing leaks such as avoiding string concatenation, unnecessary object creation, and properly closing resources. The document concludes with a question and answer section.
Aem dispatcher – tips & tricks
The document provides tips and best practices for configuring multiple farms in AEM Dispatcher. Key points include:
- Splitting the Dispatcher configuration into multiple farms based on different caching needs, such as separate farms for DAM assets and pages.
- Configuring different caching parameters and cache folders for each farm to optimize caching behavior.
- Handling cache invalidation requests and vanity URLs across multiple farms.
- Different approaches for flushing caches from Author and multiple Publishers to Dispatchers, and avoiding race conditions.
- Bypassing the Dispatcher cache for select clients by rewriting URLs to include parameters checked by the Dispatcher configuration.
NodeJS for Beginner
This document provides an introduction to NodeJS for beginners. It discusses what NodeJS is, how it uses non-blocking I/O and event-driven architecture, and how to set up NodeJS. It also covers global objects, modules, asynchronous vs synchronous code, core NodeJS modules like filesystem and events, and how to create a basic "Hello World" NodeJS application.
Performance Tuning - Memory leaks, Thread deadlocks, JDK tools
How to identify memory leaks in java applications, thread contentions, using jdk in built tools to identify performance bottlenecks
Introduction to Node js
The document provides an introduction to building a simple web server in Node.js. It discusses organizing the code into modules, including a server module to start the web server, a routes module to route requests, and a request handlers module. It also covers basic concepts like using the http module to create a server, handling requests, and returning responses. The server currently returns the same "Hello World" response for all requests, and next steps involve routing requests to proper handlers to return the appropriate content based on the URL.
Sending Email Basics PHP
This document provides an overview of how to send emails with various headers using PHP. It discusses requirements, examples, the main email fields like sender, recipient, subject and message. It also covers additional fields like carbon copies, blind copies, reply-to, errors to, message ID. It explains how to send HTML vs text emails and attach files. The document includes code examples and links to additional tutorials.
JVM Memory Management Details
Azul Systems. Are you interested in learning what a Java Virtual Machine (JVM) is and what it does for your Java applications? This presentation will provide insight into the inner workings of a Java Virtual Machine and some drill down on what compilers and garbage collectors do, so that you don't have to worry about it while programming your Java application. In particular, you will learn about common optimizations, well established garbage collection algorithms, and what the current biggest challenge with Java scalability is today.
Java Spring framework, Dependency Injection, DI, IoC, Inversion of Control
Hi, I just prepared a presentation on Java Spring Framework, the topics covered include architecture of Spring framework and it's modules. Spring Core is explained in detail including but not limited to Inversion of Control (IoC), Dependency Injection (DI) etc. Thank you and happy learning. :)
JavaScript Promises
JavaScript Promise presentation prepared for JSChannel Bengaluru Meetup on 23rd, August, 2014. It covers promise examples in jQuery, q library, AngularJS and Node.js.
Code Examples:
https://github.com/pulakb/JavaScript-Promises
Spring framework
Spring workshop at Capegemini Pune on 15th June 2012 presented by Rajkumar Singh
www.rajkrrsingh.blogspot.con
Spring Boot
Overview of Spring Boot for the rapid development of Java Applications and Microservices. More information can be found at : https://www.spiraltrain.nl/course-spring-boot-development/?lang=en
Java Presentation
1) The document discusses Java concepts across 5 doses: the Java Community Process, Java characteristics, terminology, platforms, and frameworks.
2) It covers key Java characteristics like being cross-platform, using object-oriented programming, having robust and good performance, and automatic memory management.
3) Important Java terminology is defined, like the Java Virtual Machine (JVM), Java Runtime Environment (JRE), and Java Development Kit (JDK).
4) The main Java platforms - Java SE, Java ME, and Java EE - are outlined, describing their uses for general applications, limited devices, and enterprise software respectively.
5) Popular Java frameworks for testing, building, GUIs, IDE
Polymorphism in oop
The document discusses polymorphism in object-oriented programming. It defines polymorphism as the ability for one form to take multiple forms. There are two main types of polymorphism: method overloading and method overriding. Method overloading involves methods with the same name but different parameters, while method overriding involves methods with the same name and parameters but different implementations in superclasses and subclasses. The document provides examples of each type and explains that polymorphism allows code reuse and flexibility through different object behaviors based on their types.
Installation eclipse
This document provides instructions for installing Eclipse and setting up a Java development environment on Windows. It is a 2 step process:
1) Install the Java JDK package if not already installed. Download and install the latest JDK from Oracle's website.
2) Download and install the Eclipse IDE from the Eclipse website. When setting up Eclipse, select the "Java" perspective and create a new Java project, giving it a name. Then create a new Java class file within the project.
dotMemory 4 - What's inside?
Even if your program is just a few lines of code, .NET's runtime will create a number of object in memory. Are all objects being destroyed by the garbage collector? Or is there a potential memory leak? And why is the application seemingly slow when having lots of objects in memory? In this webinar, we'll explore the new dotMemory 4 memory profiler. We'll see why we want to use a memory profiler and how easy it is to use JetBrains dotMemory for that.
Java DataBase Connectivity API (JDBC API)
JDBC is a Java-based data access technology (Java Standard Edition platform) from Oracle Corporation. This technology is an API for the Java programming language that defines how a client may access a database. It provides methods for querying and updating data in a database. JDBC is oriented towards relational databases. A JDBC-to-ODBC bridge enables connections to any ODBC-accessible data source in the JVM host environment.
Front end-security
The document discusses security issues that can occur on the web front end, including cross-site scripting (XSS), cross-site request forgery (CSRF), and hijacking. It covers how the same-origin policy works and can be relaxed through mechanisms like document.domain and CORS. Specific types of XSS like persistent and DOM-based XSS are described. The document also discusses CSRF, hijacking techniques like clickjacking, and methods for finding vulnerabilities like XSS filtering and fuzzing. Defensive techniques like X-Frame-Options, Content Security Policy, HTTPS, and CSRF tokens are recommended.
Locators in selenium - BNT 09
Locators are used in Selenium to identify specific elements on a webpage. The common locator types are id, name, class, tag name, link text, XPath, and CSS. Id is the preferred locator since each element should have a unique id. Code examples are provided to find elements by id and name by passing the locator value to the findElement method. Additional XPath locator techniques include using direct paths, attribute values, contains and other string matching functions to locate elements.
Introduction to method overloading & method overriding in java hdm
This document introduces method overloading and method overriding in Java. Method overloading allows a class to have multiple methods with the same name but different parameters. It increases readability. Method overriding allows a subclass to provide a specific implementation of a method declared in the parent class. It is used for runtime polymorphism where the method being called is determined by the object type. The document provides examples of method overloading by changing number/type of arguments and of method overriding where the subclass overrides the parent's display method.
JVM Under The Hood WDI.pdf
The document discusses Java compilation and the Java Virtual Machine. It explains that Java code is first compiled to bytecode, then just-in-time compiled by the JVM to native machine code using multiple compilers. The JVM uses a technique called tiered compilation that starts with simple compilation and progresses to more optimized compilation. Tiered compilation aims to provide both fast startup and high performance.
Web container and Apache Tomcat
The document discusses web containers and how they work. It begins with definitions of key terms like web container, web server, application server, and EJB container. It then explains that a web container is responsible for managing the lifecycle of servlets and mapping URLs to servlets. The document also discusses how web containers use servlet engines to execute servlets and JSP engines to execute Java Server Pages. It provides details on the popular Apache Tomcat web container, including how to install, configure, deploy applications to, and develop applications on Tomcat.
Method overloading
The document discusses method overloading and overriding in Java. It defines method overloading as having multiple methods with the same name but different parameters, while overriding involves subclasses providing specific implementations of methods in the parent class. It provides examples of overloading methods by changing parameters and data types, and explains why overriding is not possible by only changing the return type due to ambiguity. The use of the super keyword to refer to parent class members is also explained.
javascript.ppt
This document introduces JavaScript and provides an example "Hello World" script. It discusses that JavaScript is a client-side scripting language executed in browsers, not to be confused with the similar-sounding Java. The document then demonstrates including a basic JavaScript code within HTML using <script> tags, and explains how the Hello World script uses document.write() to output text on the page.
Multiple Choice Questions on JAVA (object oriented programming) bank 7 -- abs...
The document contains a collection of multiple choice questions and answers about abstract classes in object-oriented programming. It includes 14 questions that test understanding of key concepts of abstract classes such as: when the abstract keyword is used, defining abstract methods, preventing instantiation of abstract classes, requiring subclasses to implement abstract methods, and preventing inheritance of classes. Each question is presented on an even page with its answer on the adjacent odd page.
Node js introduction
Node.js is a server-side JavaScript platform built on Google's V8 engine. It is non-blocking and asynchronous, making it suitable for data-intensive real-time applications. The document discusses how to install Node.js and its dependencies on Ubuntu, introduces key Node.js concepts like events and the event loop, and provides examples of popular Node.js packages and use cases.
AEM (CQ) Dispatcher Security and CDN+Browser Caching
This presentation cover Adobe AEM Dispatcher security and CDN and browser caching.
This presentation is the second part of a webinar on AEM Dispatcher:
http://dev.day.com/content/ddc/en/gems/dispatcher-caching---new-features-and-optimizations.html
Visit url above to view the whole presentation. Domique Pfister the primary engineer developing AEM Dispatcher covers the first part on new features.
Spring Boot in Action
This document discusses Spring Boot and how it provides automatic configuration for common web application functionalities like JPA, security, and Spring MVC. It also covers how Spring Boot uses starter dependencies to select libraries automatically and provides tools like the CLI and Spring Initializr. The document then demonstrates creating a basic Spring Boot application and discusses testing Spring Boot applications using techniques like mocking Spring MVC and integrating tests.
PHP.ppt
PHP is a widely-used open source scripting language suited for web development. It is a server-side language that executes code on the server and outputs HTML to be sent to the client. PHP code is embedded into HTML files and enclosed in <?php ?> tags. It supports many databases and runs on various platforms. A basic "Hello World" PHP program simply displays that text using an echo statement. Comments are made with // for single lines or /* */ for blocks.
Android - Preventing common memory leaks
The document discusses common causes of and solutions to memory leaks in Android applications. It covers issues related to using the correct Context, holding references to activities from outside their scope, non-static inner classes holding implicit references to their outer class, threads not being garbage collected, and forgetting to recycle bitmaps. The key recommendations are to always use Application Context when possible, avoid leaking references between scopes, make handlers and inner classes static when possible, implement cancellation for threads, and properly recycle bitmaps.
Identifying memory leaks in Android applications
A very brief introduction to using DDMS and Eclipse Memory Analyzer to identify the source of a memory leak in an Android application.
More Related Content
What's hot
JavaScript Promises
JavaScript Promise presentation prepared for JSChannel Bengaluru Meetup on 23rd, August, 2014. It covers promise examples in jQuery, q library, AngularJS and Node.js.
Code Examples:
https://github.com/pulakb/JavaScript-Promises
Spring framework
Spring workshop at Capegemini Pune on 15th June 2012 presented by Rajkumar Singh
www.rajkrrsingh.blogspot.con
Spring Boot
Overview of Spring Boot for the rapid development of Java Applications and Microservices. More information can be found at : https://www.spiraltrain.nl/course-spring-boot-development/?lang=en
Java Presentation
1) The document discusses Java concepts across 5 doses: the Java Community Process, Java characteristics, terminology, platforms, and frameworks.
2) It covers key Java characteristics like being cross-platform, using object-oriented programming, having robust and good performance, and automatic memory management.
3) Important Java terminology is defined, like the Java Virtual Machine (JVM), Java Runtime Environment (JRE), and Java Development Kit (JDK).
4) The main Java platforms - Java SE, Java ME, and Java EE - are outlined, describing their uses for general applications, limited devices, and enterprise software respectively.
5) Popular Java frameworks for testing, building, GUIs, IDE
Polymorphism in oop
The document discusses polymorphism in object-oriented programming. It defines polymorphism as the ability for one form to take multiple forms. There are two main types of polymorphism: method overloading and method overriding. Method overloading involves methods with the same name but different parameters, while method overriding involves methods with the same name and parameters but different implementations in superclasses and subclasses. The document provides examples of each type and explains that polymorphism allows code reuse and flexibility through different object behaviors based on their types.
Installation eclipse
This document provides instructions for installing Eclipse and setting up a Java development environment on Windows. It is a 2 step process:
1) Install the Java JDK package if not already installed. Download and install the latest JDK from Oracle's website.
2) Download and install the Eclipse IDE from the Eclipse website. When setting up Eclipse, select the "Java" perspective and create a new Java project, giving it a name. Then create a new Java class file within the project.
dotMemory 4 - What's inside?
Even if your program is just a few lines of code, .NET's runtime will create a number of object in memory. Are all objects being destroyed by the garbage collector? Or is there a potential memory leak? And why is the application seemingly slow when having lots of objects in memory? In this webinar, we'll explore the new dotMemory 4 memory profiler. We'll see why we want to use a memory profiler and how easy it is to use JetBrains dotMemory for that.
Java DataBase Connectivity API (JDBC API)
JDBC is a Java-based data access technology (Java Standard Edition platform) from Oracle Corporation. This technology is an API for the Java programming language that defines how a client may access a database. It provides methods for querying and updating data in a database. JDBC is oriented towards relational databases. A JDBC-to-ODBC bridge enables connections to any ODBC-accessible data source in the JVM host environment.
Front end-security
The document discusses security issues that can occur on the web front end, including cross-site scripting (XSS), cross-site request forgery (CSRF), and hijacking. It covers how the same-origin policy works and can be relaxed through mechanisms like document.domain and CORS. Specific types of XSS like persistent and DOM-based XSS are described. The document also discusses CSRF, hijacking techniques like clickjacking, and methods for finding vulnerabilities like XSS filtering and fuzzing. Defensive techniques like X-Frame-Options, Content Security Policy, HTTPS, and CSRF tokens are recommended.
Locators in selenium - BNT 09
Locators are used in Selenium to identify specific elements on a webpage. The common locator types are id, name, class, tag name, link text, XPath, and CSS. Id is the preferred locator since each element should have a unique id. Code examples are provided to find elements by id and name by passing the locator value to the findElement method. Additional XPath locator techniques include using direct paths, attribute values, contains and other string matching functions to locate elements.
Introduction to method overloading & method overriding in java hdm
This document introduces method overloading and method overriding in Java. Method overloading allows a class to have multiple methods with the same name but different parameters. It increases readability. Method overriding allows a subclass to provide a specific implementation of a method declared in the parent class. It is used for runtime polymorphism where the method being called is determined by the object type. The document provides examples of method overloading by changing number/type of arguments and of method overriding where the subclass overrides the parent's display method.
JVM Under The Hood WDI.pdf
The document discusses Java compilation and the Java Virtual Machine. It explains that Java code is first compiled to bytecode, then just-in-time compiled by the JVM to native machine code using multiple compilers. The JVM uses a technique called tiered compilation that starts with simple compilation and progresses to more optimized compilation. Tiered compilation aims to provide both fast startup and high performance.
Web container and Apache Tomcat
The document discusses web containers and how they work. It begins with definitions of key terms like web container, web server, application server, and EJB container. It then explains that a web container is responsible for managing the lifecycle of servlets and mapping URLs to servlets. The document also discusses how web containers use servlet engines to execute servlets and JSP engines to execute Java Server Pages. It provides details on the popular Apache Tomcat web container, including how to install, configure, deploy applications to, and develop applications on Tomcat.
Method overloading
The document discusses method overloading and overriding in Java. It defines method overloading as having multiple methods with the same name but different parameters, while overriding involves subclasses providing specific implementations of methods in the parent class. It provides examples of overloading methods by changing parameters and data types, and explains why overriding is not possible by only changing the return type due to ambiguity. The use of the super keyword to refer to parent class members is also explained.
javascript.ppt
This document introduces JavaScript and provides an example "Hello World" script. It discusses that JavaScript is a client-side scripting language executed in browsers, not to be confused with the similar-sounding Java. The document then demonstrates including a basic JavaScript code within HTML using <script> tags, and explains how the Hello World script uses document.write() to output text on the page.
Multiple Choice Questions on JAVA (object oriented programming) bank 7 -- abs...
The document contains a collection of multiple choice questions and answers about abstract classes in object-oriented programming. It includes 14 questions that test understanding of key concepts of abstract classes such as: when the abstract keyword is used, defining abstract methods, preventing instantiation of abstract classes, requiring subclasses to implement abstract methods, and preventing inheritance of classes. Each question is presented on an even page with its answer on the adjacent odd page.
Node js introduction
Node.js is a server-side JavaScript platform built on Google's V8 engine. It is non-blocking and asynchronous, making it suitable for data-intensive real-time applications. The document discusses how to install Node.js and its dependencies on Ubuntu, introduces key Node.js concepts like events and the event loop, and provides examples of popular Node.js packages and use cases.
AEM (CQ) Dispatcher Security and CDN+Browser Caching
This presentation cover Adobe AEM Dispatcher security and CDN and browser caching.
This presentation is the second part of a webinar on AEM Dispatcher:
http://dev.day.com/content/ddc/en/gems/dispatcher-caching---new-features-and-optimizations.html
Visit url above to view the whole presentation. Domique Pfister the primary engineer developing AEM Dispatcher covers the first part on new features.
Spring Boot in Action
This document discusses Spring Boot and how it provides automatic configuration for common web application functionalities like JPA, security, and Spring MVC. It also covers how Spring Boot uses starter dependencies to select libraries automatically and provides tools like the CLI and Spring Initializr. The document then demonstrates creating a basic Spring Boot application and discusses testing Spring Boot applications using techniques like mocking Spring MVC and integrating tests.
PHP.ppt
PHP is a widely-used open source scripting language suited for web development. It is a server-side language that executes code on the server and outputs HTML to be sent to the client. PHP code is embedded into HTML files and enclosed in <?php ?> tags. It supports many databases and runs on various platforms. A basic "Hello World" PHP program simply displays that text using an echo statement. Comments are made with // for single lines or /* */ for blocks.
What's hot (20)
Introduction to method overloading & method overriding in java hdm
Introduction to method overloading & method overriding in java hdm
Multiple Choice Questions on JAVA (object oriented programming) bank 7 -- abs...
Multiple Choice Questions on JAVA (object oriented programming) bank 7 -- abs...
AEM (CQ) Dispatcher Security and CDN+Browser Caching
AEM (CQ) Dispatcher Security and CDN+Browser Caching
Viewers also liked
Android - Preventing common memory leaks
The document discusses common causes of and solutions to memory leaks in Android applications. It covers issues related to using the correct Context, holding references to activities from outside their scope, non-static inner classes holding implicit references to their outer class, threads not being garbage collected, and forgetting to recycle bitmaps. The key recommendations are to always use Application Context when possible, avoid leaking references between scopes, make handlers and inner classes static when possible, implement cancellation for threads, and properly recycle bitmaps.
Identifying memory leaks in Android applications
A very brief introduction to using DDMS and Eclipse Memory Analyzer to identify the source of a memory leak in an Android application.
lightning talk : Android memory leak
This document discusses identifying and detecting memory leaks in Android applications. It notes that garbage collection alone does not prevent memory leaks and provides steps for detecting leaks such as using DDMS to take heap snapshots and analyzing them with Eclipse MAT. References are also provided for learning more about memory management for Android apps.
Memory Leaks in Android Applications
This presentation aims to demonstrate the importance of certain practices in Android Application Development to avoid annoying memory leaks which lead to fatal crash .
Memory management for_android_apps
- Memory management for Android apps has changed with Gingerbread and Honeycomb, increasing heap sizes and improving garbage collection to reduce pauses
- Understanding log messages and using heap dumps can help debug memory issues like leaks caused by lingering references to activities or contexts
- The Eclipse Memory Analyzer tool allows inspection of heap dumps to identify dominator trees and retained objects causing leaks
LCA13: Memory Hotplug on Android
Memory hotplug allows increasing or decreasing the amount of memory available at runtime. There are two modes: logical memory hotplug changes availability without hardware changes, while physical hotplug installs/removes DIMMs or NUMA nodes. Mobile devices use memory hotplug to power down memory and save power, but it can take minutes and fail. RAM power management techniques like temperature compensated self refresh, partial array self refresh, and deep power-down can save 5-15% power by automatically or manually powering down RAM chunks when not in use. Proposed approaches include using a memory buffer or balloon driver to reclaim memory for these techniques during suspend without affecting the kernel or user applications. Issues include quality of service, latency
[Vietnam Mobile Day 2013] - Memory management for android applications
The document discusses memory management for Android apps. It covers heap size limits which have increased over time from 16MB to 64MB on newer devices. It also discusses garbage collection, noting that earlier versions had stop-the-world pauses over 100ms while newer versions since Gingerbread are concurrent with pauses under 5ms. Bitmap management is also covered, explaining how bitmaps were freed via recycle() before Android 2.3, resulting in full garbage collections, whereas newer versions free bitmaps synchronously during concurrent garbage collection.
Static Memory Leak Detector
The document describes a static memory leak detector tool for C language programs. It discusses what memory leaks are, common causes and scenarios where they are serious issues. The tool aims to detect memory leaks at compile time by parsing C code, generating symbol tables, tracing memory allocations and deallocations, and generating reports of any leaks found. Its advantages include finding leaks earlier without running the program, saving debugging time and memory. Challenges include accurately parsing C and integrating the tool with existing C compilers.
Detecting Memory Leaks in Android App
Detect Memory leaks in android app with Eclipse Plugin MAT. Presentation talks about what is memory leaks and how to detect it using MAT
[CCC-28c3] Post Memory Corruption Memory Analysis
The document summarizes the Post Memory Corruption Memory Analysis (PMCMA) tool. PMCMA allows finding and testing exploitation scenarios resulting from invalid memory accesses. It provides a roadmap to exploitation without generating exploit code. The tool analyzes programs after crashes to overwrite memory locations in forked processes and test impact on execution flow.
C++ memory leak detection
Memory leaks occur when a program fails to free memory that is no longer needed, resulting in unused memory increasing over time. This can happen when programmers forget to delete dynamically allocated memory, delete only part of a series of allocations, or have errors in handling pointers. Tools like Visual Leak Detector can detect leaks by tracking memory allocations and deletions, but some leaks may be difficult to find without carefully reviewing code. It is best to organize code well and use techniques like reference counting or garbage collection to prevent leaks.
Performance optimization techniques for Java code
The presentation covers the the basics of performance optimizations for real-world Java code. It starts with a theoretical overview of the concepts followed by several live demos
showing how performance bottlenecks can be diagnosed and eliminated. The demos include some non-trivial multi-threaded examples
inspired by real-world applications.
Java Performance Tuning
The document discusses various techniques for improving Java application performance, including:
1. Using tools like JVisualVM and JConsole to analyze performance bottlenecks and determine where to focus optimization efforts.
2. Customizing the Java runtime environment through JVM options and garbage collection settings.
3. Following programming tips like using object scopes and final modifiers efficiently, choosing appropriate collection types, leveraging concurrency constructs properly.
4. Reading further on techniques involving Java I/O, NIO, locks, and lock-free programming.
Detect all memory leaks with LeakCanary!
Slides for my talk at the Square Presents - Streamlining Android Apps: https://corner.squareup.com/2015/06/streamlining-android-apps.html
In just a few few weeks, we reduced by 94% the OutOfMemoryError crashes in the Square Register Android app. We built squ.re/leakcanary to automatically detect memory leaks and make it very easy to fix them. This talk will cover the principles as well as the underlying implementation details. We'll dig into a few interesting examples and lessons learned.
Introduction of Java GC Tuning and Java Java Mission Control
This document provides an introduction and overview of Java garbage collection (GC) tuning and the Java Mission Control tool. It begins with information about the speaker, Leon Chen, including his background and patents. It then outlines the Java and JVM roadmap and upcoming features. The bulk of the document discusses GC tuning concepts like heap sizing, generation sizing, footprint vs throughput vs latency. It provides examples and recommendations for GC logging, analysis tools like GCViewer and JWorks GC Web. The document is intended to outline Oracle's product direction and future plans for Java GC tuning and tools.
Jvm Performance Tunning
JVM performance tuning guide.
describes JVM memory structure and explains gc mechanism.
and guide for tuning jvm.
Linux memory-management-kamal
This document provides an overview of Linux memory management concepts including:
- RAM usage and primary vs secondary memory
- Memory mapping, process address spaces, and segmentation
- Pages, frames, page tables, and virtual memory
- Memory nodes, zones, and NUMA concepts
- Kernel memory allocation, page faults, and troubleshooting memory issues
Viewers also liked (20)
[Vietnam Mobile Day 2013] - Memory management for android applications
[Vietnam Mobile Day 2013] - Memory management for android applications
Introduction of Java GC Tuning and Java Java Mission Control
Introduction of Java GC Tuning and Java Java Mission Control
Similar to Memory leak
Mule memory leak issue
This document discusses Java memory leaks. It provides an overview of Java memory management and the behaviors observed with memory leaks. It describes how to generate heap dumps and analyze them using tools like Eclipse Memory Analyzer to identify leaked objects and their referencing paths. Specifically, it outlines how to use MAT to find leak suspects, inspect objects' references, and view thread stacks to locate the root cause of memory leaks.
JVM memory metrics and rules for detecting likely OOM caused crash
The document discusses memory leaks in Java applications that can lead to out of memory (OOM) crashes. It describes how objects are allocated in the Java heap and collected by the garbage collector. A pattern of frequent full garbage collections with few minor collections indicates a memory leak as old generation memory fills up from lingering objects. The document proposes an algorithm to monitor memory usage, track tenured memory and garbage collection logs over time to detect this pattern and raise alarms before an OOM crash occurs.
JVM memory metrics and rules for detecting possible OOM caused crash
The document describes memory usage pattern in JVM at OOM, and identifies rules for an early detection system which can alert about impending OOM error, and hence a crash.
Garbage Collection, Tuning And Monitoring JVM In EBS 11i And R12
The document discusses garbage collection, tuning, and monitoring the Java Virtual Machine (JVM) in Oracle E-Business Suite 11i and R12. It begins by introducing garbage collection and its role in memory management. It then covers key garbage collection concepts like generations, collectors, and metrics for measurement. The document also lists some notable JVM parameters and provides guidance on monitoring the JVM. It concludes by mentioning future changes related to the JRockit JVM.
Java garbage collection, jvm, visual vm
This document discusses the Java heap and stack memory areas, garbage collection (GC) in the Java Virtual Machine (JVM), and tools for monitoring JVM memory usage and GC. It describes the heap, stack, and how objects are allocated in each. It outlines the different GC generations (Eden, Survivor, Tenured) and collectors (default, parallel, CMS, G1GC). It also defines a Java memory leak and provides symptoms. Finally, it lists several tools for monitoring JVM memory and GC, including Visual VM, JConsole, and jcmd.
A quick view about Java Virtual Machine
The document provides an overview of the Java Virtual Machine (JVM). It discusses that the JVM abstracts both the hardware layer and operating system, allowing Java programs to run on multiple platforms. It also describes how the JVM uses just-in-time compilation to optimize bytecode as it runs and manages memory using a heap and garbage collection. Key aspects of the JVM like the heap, garbage collectors, and metaspace replacement of permgen are summarized.
Javasession10
Java manages memory automatically through garbage collection. Objects are stored in heap memory and are eligible for garbage collection when no references to the object exist. The garbage collector runs periodically in its own thread to identify dereferenced objects and free up memory. Programmers cannot force garbage collection but can request it. OutOfMemoryErrors occur when there is insufficient memory for new objects.
Short notes of oop with java
This document provides an introduction to object oriented programming concepts in Java. It discusses key topics like what a computer is, developer skills, memory management, and an introduction to Java. Object oriented programming principles like inheritance, abstraction, encapsulation, and polymorphism are defined. The document also covers exceptions in Java like defining exceptions, reasons they occur, and handling exceptions.
Sporar
The document discusses different tools for finding memory leaks in Java applications. It summarizes the types of tools as inspecting the heap and using instrumentation. Inspecting the heap allows seeing relationships between objects but provides no information on how they got there, while instrumentation identifies objects that may cause leaks but does not show relationships and introduces overhead. The document recommends using both categories of tools and provides examples of profiling tools and case studies of memory leaks discovered.
Profiling JavaScript Performance
I used this deck to introduce JavaScript performance profiling at the 5th meeting of the Front-End.IL Meetup: http://j.mp/18TFxin . Tame the Unruly Teenage JavaScript Monster using the Chrome DevTools CPU and Memory profilers.
Jvm performance tuning
This document discusses monitoring and tuning Java applications for performance. It covers monitoring garbage collection and threads in the Java Virtual Machine, method profiling to identify slow execution paths, object creation profiling, monitoring gross memory usage, and thread profiling. It also summarizes the key aspects of monitoring Java applications and JVM.
Troubleshooting Java HotSpot VM
While working with Java applications running on the Java HotSpot VM, we might sometimes encounter problems such as application hangs, memory leaks, unexpected application behavior, or crashes. Troubleshooting such problems can be very hard and tricky. But with knowledge of the right set of tools and utilities for nailing these problems down and how to approach them, troubleshooting can be made much easier and can help us develop stable, reliable, and efficient Java applications. This slides deck covers how we should approach these JVM issues and which tools and utilities are useful for diagnosing and troubleshooting them.
Effectively Troubleshoot 9 Types of OutOfMemoryError
Embark on a journey into the depths of java.lang.OutOfMemoryError as we unravel its complex nature. Discover the nine distinct faces of this memory-related challenge and gain valuable insights into their unique causes and solutions. This session equips you with the knowledge, tools, and techniques needed to troubleshoot and conquer OutOfMemoryError in all its forms, ensuring smoother, more efficient Java applications.
TechGIG_Memory leaks in_java_webnair_26th_july_2012
Memory leaks in Java can occur due to objects remaining reachable even when no longer needed. The four main causes are unknown references, long-living objects, failure to clean up native resources, and bugs. To detect leaks, one can use verbose GC logging, monitor the Java process, dump the heap to analyze which objects are retaining others, and use profiling tools. Profiling works by insertion of code, sampling, or instrumenting the virtual machine and helps identify where time is being spent and what objects are being allocated.
JetBrains Day Seoul - Exploring .NET’s memory management – a trip down memory...
The .NET Garbage Collector (GC) is really cool. It helps providing our applications with virtually unlimited memory, so we can focus on writing code instead of manually freeing up memory. But how does .NET manage that memory? What are hidden allocations? Are strings evil? It still matters to understand when and where memory is allocated. In this talk, we’ll go over the base concepts of .NET memory management and explore how .NET helps us and how we can help .NET – making our apps better. Expect profiling, Intermediate Language (IL), ClrMD and more!
Eclipse Memory Analyzer - More Than Just a Heap Walker
The document discusses the Eclipse Memory Analyzer tool, which helps simplify memory analysis of Java heap dumps. It can open large heap dumps from 64-bit machines, find objects of interest among millions, detect memory leaks, and support various dump formats from IBM systems. The tool provides automated analysis, reports on memory usage by component, and a bundle explorer for Equinox OSGi applications. It aims to make memory analysis easier for users through extensibility and free availability.
Eclipse Memory Analyzer
The document discusses Eclipse Memory Analyzer, a tool for analyzing Java heap dumps and system dumps. It can simplify memory analysis of large heap dumps, provide automated detection of memory leak suspects, and allow exploration of OSGi bundles in an application. Key features include a dominator tree for identifying retained memory, a query language, and adapters for analyzing different dump formats like IBM system dumps.
Web Sphere Problem Determination Ext
This document provides an overview and agenda for the "Busy Java Developer's Guide to WebSphere Debugging & Troubleshooting" presentation. The presentation covers various WebSphere Application Server components, troubleshooting tools like IBM Support Assistant, JVM troubleshooting tools, problem determination tools, common problem scenarios, how customers run into trouble, and includes a demo and Q&A section. It provides an in-depth look at debugging and resolving issues with WebSphere Application Server.
Refactor to the Limit!
The document discusses various tools for detecting code smells and refactoring opportunities in Java codebases:
1. JDeodorant detects code smells like God Classes and Feature Envy and suggests refactorings. It analyzed a 120k LOC codebase in 11 minutes.
2. JMove identifies Feature Envy smells and proposes moving methods to better classes. It provided 13 suggestions for a codebase in 45 minutes.
3. JSpIRIT identifies 10 code smells and found 1349 in a codebase in 1 minute. Clicking a smell brings you to the problematic code.
4. Stench Blossom identifies smells as you code to avoid stopping work. It indicates smells without suggestions
02D-Memory Management in Java.pptx
The document discusses memory management in Java. It covers:
- How memory is allocated in the Java heap using a free block list and allocated block list.
- The Java heap is divided into static and dynamic sections, with garbage collection applied to the dynamic section.
- Garbage collection automatically frees memory for objects no longer in use, allowing Java programmers to avoid manually freeing memory.
Similar to Memory leak (20)
JVM memory metrics and rules for detecting likely OOM caused crash
JVM memory metrics and rules for detecting likely OOM caused crash
JVM memory metrics and rules for detecting possible OOM caused crash
JVM memory metrics and rules for detecting possible OOM caused crash
Garbage Collection, Tuning And Monitoring JVM In EBS 11i And R12
Garbage Collection, Tuning And Monitoring JVM In EBS 11i And R12
Effectively Troubleshoot 9 Types of OutOfMemoryError
Effectively Troubleshoot 9 Types of OutOfMemoryError
TechGIG_Memory leaks in_java_webnair_26th_july_2012
TechGIG_Memory leaks in_java_webnair_26th_july_2012
JetBrains Day Seoul - Exploring .NET’s memory management – a trip down memory...
JetBrains Day Seoul - Exploring .NET’s memory management – a trip down memory...
Eclipse Memory Analyzer - More Than Just a Heap Walker
Eclipse Memory Analyzer - More Than Just a Heap Walker
Recently uploaded
June Patch Tuesday
Ivanti’s Patch Tuesday breakdown goes beyond patching your applications and brings you the intelligence and guidance needed to prioritize where to focus your attention first. Catch early analysis on our Ivanti blog, then join industry expert Chris Goettl for the Patch Tuesday Webinar Event. There we’ll do a deep dive into each of the bulletins and give guidance on the risks associated with the newly-identified vulnerabilities.
Ocean lotus Threat actors project by John Sitima 2024 (1).pptx
Ocean Lotus cyber threat actors represent a sophisticated, persistent, and politically motivated group that poses a significant risk to organizations and individuals in the Southeast Asian region. Their continuous evolution and adaptability underscore the need for robust cybersecurity measures and international cooperation to identify and mitigate the threats posed by such advanced persistent threat groups.
System Design Case Study: Building a Scalable E-Commerce Platform - Hiike
This case study explores designing a scalable e-commerce platform, covering key requirements, system components, and best practices.
Best 20 SEO Techniques To Improve Website Visibility In SERP
Boost your website's visibility with proven SEO techniques! Our latest blog dives into essential strategies to enhance your online presence, increase traffic, and rank higher on search engines. From keyword optimization to quality content creation, learn how to make your site stand out in the crowded digital landscape. Discover actionable tips and expert insights to elevate your SEO game.
Letter and Document Automation for Bonterra Impact Management (fka Social Sol...
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on automated letter generation for Bonterra Impact Management using Google Workspace or Microsoft 365.
Interested in deploying letter generation automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Salesforce Integration for Bonterra Impact Management (fka Social Solutions A...
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on integration of Salesforce with Bonterra Impact Management.
Interested in deploying an integration with Salesforce for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
A Comprehensive Guide to DeFi Development Services in 2024
DeFi represents a paradigm shift in the financial industry. Instead of relying on traditional, centralized institutions like banks, DeFi leverages blockchain technology to create a decentralized network of financial services. This means that financial transactions can occur directly between parties, without intermediaries, using smart contracts on platforms like Ethereum.
In 2024, we are witnessing an explosion of new DeFi projects and protocols, each pushing the boundaries of what’s possible in finance.
In summary, DeFi in 2024 is not just a trend; it’s a revolution that democratizes finance, enhances security and transparency, and fosters continuous innovation. As we proceed through this presentation, we'll explore the various components and services of DeFi in detail, shedding light on how they are transforming the financial landscape.
At Intelisync, we specialize in providing comprehensive DeFi development services tailored to meet the unique needs of our clients. From smart contract development to dApp creation and security audits, we ensure that your DeFi project is built with innovation, security, and scalability in mind. Trust Intelisync to guide you through the intricate landscape of decentralized finance and unlock the full potential of blockchain technology.
Ready to take your DeFi project to the next level? Partner with Intelisync for expert DeFi development services today!
Generating privacy-protected synthetic data using Secludy and Milvus
During this demo, the founders of Secludy will demonstrate how their system utilizes Milvus to store and manipulate embeddings for generating privacy-protected synthetic data. Their approach not only maintains the confidentiality of the original data but also enhances the utility and scalability of LLMs under privacy constraints. Attendees, including machine learning engineers, data scientists, and data managers, will witness first-hand how Secludy's integration with Milvus empowers organizations to harness the power of LLMs securely and efficiently.
GraphRAG for Life Science to increase LLM accuracy
GraphRAG for life science domain, where you retriever information from biomedical knowledge graphs using LLMs to increase the accuracy and performance of generated answers
Digital Marketing Trends in 2024 | Guide for Staying Ahead
https://www.wask.co/ebooks/digital-marketing-trends-in-2024
Feeling lost in the digital marketing whirlwind of 2024? Technology is changing, consumer habits are evolving, and staying ahead of the curve feels like a never-ending pursuit. This e-book is your compass. Dive into actionable insights to handle the complexities of modern marketing. From hyper-personalization to the power of user-generated content, learn how to build long-term relationships with your audience and unlock the secrets to success in the ever-shifting digital landscape.
Unlock the Future of Search with MongoDB Atlas_ Vector Search Unleashed.pdf
Discover how MongoDB Atlas and vector search technology can revolutionize your application's search capabilities. This comprehensive presentation covers:
* What is Vector Search?
* Importance and benefits of vector search
* Practical use cases across various industries
* Step-by-step implementation guide
* Live demos with code snippets
* Enhancing LLM capabilities with vector search
* Best practices and optimization strategies
Perfect for developers, AI enthusiasts, and tech leaders. Learn how to leverage MongoDB Atlas to deliver highly relevant, context-aware search results, transforming your data retrieval process. Stay ahead in tech innovation and maximize the potential of your applications.
#MongoDB #VectorSearch #AI #SemanticSearch #TechInnovation #DataScience #LLM #MachineLearning #SearchTechnology
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Monitoring and Managing Anomaly Detection on OpenShift
Overview
Dive into the world of anomaly detection on edge devices with our comprehensive hands-on tutorial. This SlideShare presentation will guide you through the entire process, from data collection and model training to edge deployment and real-time monitoring. Perfect for those looking to implement robust anomaly detection systems on resource-constrained IoT/edge devices.
Key Topics Covered
1. Introduction to Anomaly Detection
- Understand the fundamentals of anomaly detection and its importance in identifying unusual behavior or failures in systems.
2. Understanding Edge (IoT)
- Learn about edge computing and IoT, and how they enable real-time data processing and decision-making at the source.
3. What is ArgoCD?
- Discover ArgoCD, a declarative, GitOps continuous delivery tool for Kubernetes, and its role in deploying applications on edge devices.
4. Deployment Using ArgoCD for Edge Devices
- Step-by-step guide on deploying anomaly detection models on edge devices using ArgoCD.
5. Introduction to Apache Kafka and S3
- Explore Apache Kafka for real-time data streaming and Amazon S3 for scalable storage solutions.
6. Viewing Kafka Messages in the Data Lake
- Learn how to view and analyze Kafka messages stored in a data lake for better insights.
7. What is Prometheus?
- Get to know Prometheus, an open-source monitoring and alerting toolkit, and its application in monitoring edge devices.
8. Monitoring Application Metrics with Prometheus
- Detailed instructions on setting up Prometheus to monitor the performance and health of your anomaly detection system.
9. What is Camel K?
- Introduction to Camel K, a lightweight integration framework built on Apache Camel, designed for Kubernetes.
10. Configuring Camel K Integrations for Data Pipelines
- Learn how to configure Camel K for seamless data pipeline integrations in your anomaly detection workflow.
11. What is a Jupyter Notebook?
- Overview of Jupyter Notebooks, an open-source web application for creating and sharing documents with live code, equations, visualizations, and narrative text.
12. Jupyter Notebooks with Code Examples
- Hands-on examples and code snippets in Jupyter Notebooks to help you implement and test anomaly detection models.
Choosing The Best AWS Service For Your Website + API.pptx
Have you ever been confused by the myriad of choices offered by AWS for hosting a website or an API?
Lambda, Elastic Beanstalk, Lightsail, Amplify, S3 (and more!) can each host websites + APIs. But which one should we choose?
Which one is cheapest? Which one is fastest? Which one will scale to meet our needs?
Join me in this session as we dive into each AWS hosting service to determine which one is best for your scenario and explain why!
Driving Business Innovation: Latest Generative AI Advancements & Success Story
Are you ready to revolutionize how you handle data? Join us for a webinar where we’ll bring you up to speed with the latest advancements in Generative AI technology and discover how leveraging FME with tools from giants like Google Gemini, Amazon, and Microsoft OpenAI can supercharge your workflow efficiency.
During the hour, we’ll take you through:
Guest Speaker Segment with Hannah Barrington: Dive into the world of dynamic real estate marketing with Hannah, the Marketing Manager at Workspace Group. Hear firsthand how their team generates engaging descriptions for thousands of office units by integrating diverse data sources—from PDF floorplans to web pages—using FME transformers, like OpenAIVisionConnector and AnthropicVisionConnector. This use case will show you how GenAI can streamline content creation for marketing across the board.
Ollama Use Case: Learn how Scenario Specialist Dmitri Bagh has utilized Ollama within FME to input data, create custom models, and enhance security protocols. This segment will include demos to illustrate the full capabilities of FME in AI-driven processes.
Custom AI Models: Discover how to leverage FME to build personalized AI models using your data. Whether it’s populating a model with local data for added security or integrating public AI tools, find out how FME facilitates a versatile and secure approach to AI.
We’ll wrap up with a live Q&A session where you can engage with our experts on your specific use cases, and learn more about optimizing your data workflows with AI.
This webinar is ideal for professionals seeking to harness the power of AI within their data management systems while ensuring high levels of customization and security. Whether you're a novice or an expert, gain actionable insights and strategies to elevate your data processes. Join us to see how FME and AI can revolutionize how you work with data!
5th LF Energy Power Grid Model Meet-up Slides
5th Power Grid Model Meet-up
It is with great pleasure that we extend to you an invitation to the 5th Power Grid Model Meet-up, scheduled for 6th June 2024. This event will adopt a hybrid format, allowing participants to join us either through an online Mircosoft Teams session or in person at TU/e located at Den Dolech 2, Eindhoven, Netherlands. The meet-up will be hosted by Eindhoven University of Technology (TU/e), a research university specializing in engineering science & technology.
Power Grid Model
The global energy transition is placing new and unprecedented demands on Distribution System Operators (DSOs). Alongside upgrades to grid capacity, processes such as digitization, capacity optimization, and congestion management are becoming vital for delivering reliable services.
Power Grid Model is an open source project from Linux Foundation Energy and provides a calculation engine that is increasingly essential for DSOs. It offers a standards-based foundation enabling real-time power systems analysis, simulations of electrical power grids, and sophisticated what-if analysis. In addition, it enables in-depth studies and analysis of the electrical power grid’s behavior and performance. This comprehensive model incorporates essential factors such as power generation capacity, electrical losses, voltage levels, power flows, and system stability.
Power Grid Model is currently being applied in a wide variety of use cases, including grid planning, expansion, reliability, and congestion studies. It can also help in analyzing the impact of renewable energy integration, assessing the effects of disturbances or faults, and developing strategies for grid control and optimization.
What to expect
For the upcoming meetup we are organizing, we have an exciting lineup of activities planned:
-Insightful presentations covering two practical applications of the Power Grid Model.
-An update on the latest advancements in Power Grid -Model technology during the first and second quarters of 2024.
-An interactive brainstorming session to discuss and propose new feature requests.
-An opportunity to connect with fellow Power Grid Model enthusiasts and users.
Operating System Used by Users in day-to-day life.pptx
Dive into the realm of operating systems (OS) with Pravash Chandra Das, a seasoned Digital Forensic Analyst, as your guide. 🚀 This comprehensive presentation illuminates the core concepts, types, and evolution of OS, essential for understanding modern computing landscapes.
Beginning with the foundational definition, Das clarifies the pivotal role of OS as system software orchestrating hardware resources, software applications, and user interactions. Through succinct descriptions, he delineates the diverse types of OS, from single-user, single-task environments like early MS-DOS iterations, to multi-user, multi-tasking systems exemplified by modern Linux distributions.
Crucial components like the kernel and shell are dissected, highlighting their indispensable functions in resource management and user interface interaction. Das elucidates how the kernel acts as the central nervous system, orchestrating process scheduling, memory allocation, and device management. Meanwhile, the shell serves as the gateway for user commands, bridging the gap between human input and machine execution. 💻
The narrative then shifts to a captivating exploration of prominent desktop OSs, Windows, macOS, and Linux. Windows, with its globally ubiquitous presence and user-friendly interface, emerges as a cornerstone in personal computing history. macOS, lauded for its sleek design and seamless integration with Apple's ecosystem, stands as a beacon of stability and creativity. Linux, an open-source marvel, offers unparalleled flexibility and security, revolutionizing the computing landscape. 🖥️
Moving to the realm of mobile devices, Das unravels the dominance of Android and iOS. Android's open-source ethos fosters a vibrant ecosystem of customization and innovation, while iOS boasts a seamless user experience and robust security infrastructure. Meanwhile, discontinued platforms like Symbian and Palm OS evoke nostalgia for their pioneering roles in the smartphone revolution.
The journey concludes with a reflection on the ever-evolving landscape of OS, underscored by the emergence of real-time operating systems (RTOS) and the persistent quest for innovation and efficiency. As technology continues to shape our world, understanding the foundations and evolution of operating systems remains paramount. Join Pravash Chandra Das on this illuminating journey through the heart of computing. 🌟
Energy Efficient Video Encoding for Cloud and Edge Computing Instances
Energy Efficient Video Encoding for Cloud and Edge Computing Instances
Recently uploaded (20)
Ocean lotus Threat actors project by John Sitima 2024 (1).pptx
Ocean lotus Threat actors project by John Sitima 2024 (1).pptx
System Design Case Study: Building a Scalable E-Commerce Platform - Hiike
System Design Case Study: Building a Scalable E-Commerce Platform - Hiike
Best 20 SEO Techniques To Improve Website Visibility In SERP
Best 20 SEO Techniques To Improve Website Visibility In SERP
Letter and Document Automation for Bonterra Impact Management (fka Social Sol...
Letter and Document Automation for Bonterra Impact Management (fka Social Sol...
Salesforce Integration for Bonterra Impact Management (fka Social Solutions A...
Salesforce Integration for Bonterra Impact Management (fka Social Solutions A...
A Comprehensive Guide to DeFi Development Services in 2024
A Comprehensive Guide to DeFi Development Services in 2024
Generating privacy-protected synthetic data using Secludy and Milvus
Generating privacy-protected synthetic data using Secludy and Milvus
GraphRAG for Life Science to increase LLM accuracy
GraphRAG for Life Science to increase LLM accuracy
Digital Marketing Trends in 2024 | Guide for Staying Ahead
Digital Marketing Trends in 2024 | Guide for Staying Ahead
Unlock the Future of Search with MongoDB Atlas_ Vector Search Unleashed.pdf
Unlock the Future of Search with MongoDB Atlas_ Vector Search Unleashed.pdf
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Monitoring and Managing Anomaly Detection on OpenShift.pdf
Choosing The Best AWS Service For Your Website + API.pptx
Choosing The Best AWS Service For Your Website + API.pptx
Driving Business Innovation: Latest Generative AI Advancements & Success Story
Driving Business Innovation: Latest Generative AI Advancements & Success Story
WeTestAthens: Postman's AI & Automation Techniques
WeTestAthens: Postman's AI & Automation Techniques
Operating System Used by Users in day-to-day life.pptx
Operating System Used by Users in day-to-day life.pptx
Energy Efficient Video Encoding for Cloud and Edge Computing Instances
Energy Efficient Video Encoding for Cloud and Edge Computing Instances
Memory leak
- 1. Memory Leak Overview and Tools
- 2. AGENDA Overview of Java Heap What is a Memory Leak Symptoms of Memory Leaks How to troubleshoot Tools Best Practices to avoid/detect Memory Leak Q&A
- 3. Overview of Java Heap Java Heap can be categorized into three generations: - Young, Tenured and Permanent. Young generation has Eden Space and two survivor spaces. All newly created objects are kept in Eden Space and moved to one of the survivor space after it survives few gc’s. From one survivor space it moves to another. At an instant one of the survivor space is completely free. From the survivor space, objects are moved to the tenured generations. Permanent holds class data, such as describing classes and methods.
- 4. What is a Memory Leak Memory leak is when objects are not removed from the heap even when they are not required. This can be due to application code, application server code, database driver or third party jar files.
- 5. Symptoms of Memory Leak Very frequent FULL GC Lesser memory is reclaimed on each Full GC Available free heap keeps on decreasing over time Response time decreases
- 6. How to troubleshoot Gather GC Information by adding the following JVM flags -Xloggc=filename verbose:gc -XX:+PrintGCTimeStamps -XX:+PrintGCDetails
- 7. Tools Use GC Viewer to analyze the gc log
- 8. Jprofiler Memory profiling (Class Monitor, Allocation Monitor) Heap walker (Show all Class instances, Allocations,References) CPU profiling (Invocation Tree, Hot spots, Method Graph,CPU statistics)
- 9. Visual VM
- 10. Best Practices to avoid or detect Memory Leak Keep a watch on heap usage and use alert mechanisms. Free up unnecessary objects. Close all connections in the finally block Don’t keep too much data in session.
- 11. Q&A