JavaPerformanceChapter_1

1. Java Performance
Chapter 1
1
Saurav Basu
6/3/2020

2. Organization
1. Strategies, Approaches, and Methodologies
2. Operating System Performance Monitoring
3. JVM Overview
4. JVM Performance Monitoring
5. Java Application Profiling
6. Java Application Profiling - Tips & Tricks
7. Tuning the JVM - Step by Step
8. Benchmarking Java Applications
9. Benchmarking Multitiered Applications
10. Web Application Performance
11. Web Services Performance
12. Java Persistence & Enterprise Java Beans Performance
2

3. Organization
1. Strategies, Approaches, and Methodologies
2. Operating System Performance Monitoring
3. JVM Overview
4. JVM Performance Monitoring
5. Java Application Profiling
6. Java Application Profiling - Tips & Tricks
7. Tuning the JVM - Step by Step
8. Benchmarking Java Applications
9. Benchmarking Multitiered Applications
10. Web Application Performance
11. Web Services Performance
12. Java Persistence & Enterprise Java Beans Performance
3

4. Strategies, Approaches, and Methodologies
1. Forces at Play
2. Top Down & Bottom Up
3. Choosing Right Platform & Evaluating a System
4. Choosing Right CPU Architecture
5. Evaluating System Performance
4

5. Strategies, Approaches, and Methodologies
I don’t know what i don’t know
I know what i don’t know
I already know what i need to know
5

6. Strategies, Approaches, and Methodologies
Traditional
SDLC
Wilson &
Kesselman
6

7. Strategies, Approaches, and Methodologies
Forces At Play
Questions to Ask :-
● Expected throughput?
● Expected latency between stimulus and response to stimulus?
● Number of concurrent users to be supported?
● Expected throughput at peak concurrency?
● Maximum worst case delay?
● Frequency of Garbage collection Induced latencies that will be tolerated?
7

8. Strategies, Approaches, and Methodologies
SNo. Top Down Bottom Up
1. Code Change Possible Hardware change Possible
2. Monitor perf at load of interest (ex.
peak, continuous)
Migration to a different OS,Architecture
3. Monitor HIgher Level Statistics
a) Application performance
instrumentations
b) Java EE container
c) Operating system level
d) Java Virtual Machine (JVM)
Monitor Low Level Statistics (OS/JVM)
a) number of CPU instructions required to
execute a given workload on the CPU(path
length)
b) Cache misses when running under load
4. Tune Parameters:
Command Line
Garbage Collector
Operating System
Tune Parameters:
CPU scheduling algorithm
OS Context Switch Latency
8

9. Strategies, Approaches, and Methodologies
SNo. Top Down Bottom Up
5. Developer Performance Specialist
9