![16CONFIDENTIAL
ThreadMXBean threadMBean =
ManagementFactory.getThreadMXBean();
System.out.println("Thread count = " +
threadMBean.getThreadCount());
ThreadInfo[] threads = threadMBean
.dumpAllThreads(true, true);
for (ThreadInfo thread : threads) {
System.out.println(thread);
}](https://image.slidesharecdn.com/profilingdistributedjavaapps-170526112108/85/Profiling-distributed-Java-applications-16-320.jpg)
![17CONFIDENTIAL
ThreadMXBean threadMBean =
ManagementFactory.getThreadMXBean();
System.out.println("Thread count = " +
threadMBean.getThreadCount());
ThreadInfo[] threads = threadMBean
.dumpAllThreads(true, true);
for (ThreadInfo thread : threads) {
System.out.println(thread);
}](https://image.slidesharecdn.com/profilingdistributedjavaapps-170526112108/85/Profiling-distributed-Java-applications-17-320.jpg)
![18CONFIDENTIAL
ThreadMXBean threadMBean =
ManagementFactory.getThreadMXBean();
System.out.println("Thread count = " +
threadMBean.getThreadCount());
ThreadInfo[] threads = threadMBean
.dumpAllThreads(true, true);
for (ThreadInfo thread : threads) {
System.out.println(thread);
}](https://image.slidesharecdn.com/profilingdistributedjavaapps-170526112108/85/Profiling-distributed-Java-applications-18-320.jpg)
![37CONFIDENTIAL
AGENT EXAMPLES
HPROF Java profiler
JDWP Java debugger
JRebel/XRebel
• https://zeroturnaround.com/software/jrebel/
-agentlib:hprof[=options] ToBeProfiledClass
-agentlib:jdwp=transport=dt_socket,address=localhost:9009,server=y,suspend=y](https://image.slidesharecdn.com/profilingdistributedjavaapps-170526112108/85/Profiling-distributed-Java-applications-37-320.jpg)
![38CONFIDENTIAL
public class DemoAgent() {
public static void premain(String args, Instrumentation instr) {
instr.addTransformer(new ClassLoadingLogger());
}
}
public class ClassLoadingLogger implements ClassFileTransformer {
public byte[] transform(ClassLoader loader, String className,
Class<?> classBeingRedefined, ProtectionDomain protectionDomain,
byte[] classfileBuffer) throws IllegalClassFormatException {
System.out.println(className);
return classfileBuffer;
}
}
Manifest-Version: 1.0
Agent-Class: com.example.DemoAgent
Premain-Class: com.example.DemoAgent
> java –jar –agentlib:agent.jar app.jar](https://image.slidesharecdn.com/profilingdistributedjavaapps-170526112108/85/Profiling-distributed-Java-applications-38-320.jpg)
![39CONFIDENTIAL
public class DemoAgent() {
public static void premain(String args, Instrumentation instr) {
instr.addTransformer(new ClassLoadingLogger());
}
}
public class ClassLoadingLogger implements ClassFileTransformer {
public byte[] transform(ClassLoader loader, String className,
Class<?> classBeingRedefined, ProtectionDomain protectionDomain,
byte[] classfileBuffer) throws IllegalClassFormatException {
System.out.println(className);
return classfileBuffer;
}
}
Manifest-Version: 1.0
Agent-Class: com.example.DemoAgent
Premain-Class: com.example.DemoAgent
> java –jar –agentlib:agent.jar app.jar](https://image.slidesharecdn.com/profilingdistributedjavaapps-170526112108/85/Profiling-distributed-Java-applications-39-320.jpg)
![40CONFIDENTIAL
public class DemoAgent() {
public static void premain(String args, Instrumentation instr) {
instr.addTransformer(new ClassLoadingLogger());
}
}
public class ClassLoadingLogger implements ClassFileTransformer {
public byte[] transform(ClassLoader loader, String className,
Class<?> classBeingRedefined, ProtectionDomain protectionDomain,
byte[] classfileBuffer) throws IllegalClassFormatException {
System.out.println(className);
return classfileBuffer;
}
}
Manifest-Version: 1.0
Agent-Class: com.example.DemoAgent
Premain-Class: com.example.DemoAgent
> java –jar –agentlib:agent.jar app.jar](https://image.slidesharecdn.com/profilingdistributedjavaapps-170526112108/85/Profiling-distributed-Java-applications-40-320.jpg)
![41CONFIDENTIAL
public class DemoAgent() {
public static void premain(String args, Instrumentation instr) {
instr.addTransformer(new ClassLoadingLogger());
}
}
public class ClassLoadingLogger implements ClassFileTransformer {
public byte[] transform(ClassLoader loader, String className,
Class<?> classBeingRedefined, ProtectionDomain protectionDomain,
byte[] classfileBuffer) throws IllegalClassFormatException {
System.out.println(className);
return classfileBuffer;
}
}
Manifest-Version: 1.0
Agent-Class: com.example.DemoAgent
Premain-Class: com.example.DemoAgent
> java –jar –agentlib:agent.jar app.jar](https://image.slidesharecdn.com/profilingdistributedjavaapps-170526112108/85/Profiling-distributed-Java-applications-41-320.jpg)
Uploaded byConstantine Slisenka
Profiling distributed Java applications
The document outlines techniques and tools for profiling Java applications, focusing on both single JVM and distributed systems. It discusses the importance of accurately measuring application performance, various Java profiling methodologies, and frameworks such as Google Dapper for performance tracing across systems. The presentation includes live demos and examples of profiling tools, Java agents, and instrumentation methods to improve performance diagnostics.
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Profiling distributed Java applications
- 1. 1CONFIDENTIAL PROFILING DISTRIBUTED JAVA APPLICATIONS KANSTANTSINSLISENKA LEAD SOFTWARE ENGINEER MAY 25, 2017
- 2. 2CONFIDENTIAL Kanstantsin Slisenka Java BackendDeveloper Speaker at Tech Talks, IT Week ABOUT ME skype: kslisenko kslisenko@gmail.com kanstantsin_slisenka@epam.com
- 3.
- 4. 4CONFIDENTIAL AGENDA Profiling single JVM1 Howprofilers work Java agents (live demo) Google experience Dynatrace, Zipkin (live demo) Profiling distributed systems2
- 5.
- 6. 6CONFIDENTIAL “You can’t measure performanceof Java code not interfering with JVM”
- 7.
- 8.
- 9. 9CONFIDENTIAL Is profiler honest? NO!* *Measuredperformance = (app performance + profiler overhead) * profiler accuracy
- 10. 10CONFIDENTIAL MEASURING TIME System.currentTimeMillis() System.nanoTime() Spend time,not always accurate 1. Use benchmarks http://openjdk.java.net/projects/code-tools/jmh/ 2. Warm-up your JVM, … https://shipilev.net/talks/jpoint-April2014-benchmarking.pdf https://shipilev.net/blog/2014/nanotrusting-nanotime/
- 11. 11CONFIDENTIAL public void main(){ a(); // 100 ms Thread.sleep(200); b(); // 100 ms // GC is running – 50ms c(); // 100 ms } CPU VS WALL-CLOCK TIME
- 12. 12CONFIDENTIAL Wall-clock time As muchas it takes to execute 100 + 200 + 100 + 50 + 100 = 550 ms public void main() { a(); // 100 ms Thread.sleep(200); b(); // 100 ms // GC is running – 50ms c(); // 100 ms } CPU VS WALL-CLOCK TIME
- 13. 13CONFIDENTIAL Wall-clock time As muchas it takes to execute 100 + 200 + 100 + 50 + 100 = 550 ms CPU time Time CPU was busy 100 + 100 + 100 = 300 ms public void main() { a(); // 100 ms Thread.sleep(200); b(); // 100 ms // GC is running – 50ms c(); // 100 ms } CPU VS WALL-CLOCK TIME
- 14. 14CONFIDENTIAL JVM DIAGNOSTIC INTERFACES •JVMTI (native С++ API) • Attach API • jstack, jmap, jps, … • Performance counters • Heap Dumps • Flight Recorder • JMX – java.lang.management – custom MBeans • Java Agents – java.lang.instrument github.com/aragozin/jvm-tools
- 15.
- 16. 16CONFIDENTIAL ThreadMXBean threadMBean = ManagementFactory.getThreadMXBean(); System.out.println("Threadcount = " + threadMBean.getThreadCount()); ThreadInfo[] threads = threadMBean .dumpAllThreads(true, true); for (ThreadInfo thread : threads) { System.out.println(thread); }
- 17. 17CONFIDENTIAL ThreadMXBean threadMBean = ManagementFactory.getThreadMXBean(); System.out.println("Threadcount = " + threadMBean.getThreadCount()); ThreadInfo[] threads = threadMBean .dumpAllThreads(true, true); for (ThreadInfo thread : threads) { System.out.println(thread); }
- 18. 18CONFIDENTIAL ThreadMXBean threadMBean = ManagementFactory.getThreadMXBean(); System.out.println("Threadcount = " + threadMBean.getThreadCount()); ThreadInfo[] threads = threadMBean .dumpAllThreads(true, true); for (ThreadInfo thread : threads) { System.out.println(thread); }
- 19. 19CONFIDENTIAL Thread dumps inregular intervals c() b() a() main() SAMPLING
- 20. 20CONFIDENTIAL Thread dumps inregular intervals Injection of measurement code INSTRUMENTATION c() b() a() main() SAMPLING c() b() a() main()
- 21. 21CONFIDENTIAL Thread dumps inregular intervals Overhead depends on sampling interval Injection of measurement code Overhead depends on speed of measurement code INSTRUMENTATION c() b() a() main() SAMPLING c() b() a() main()
- 22. 22CONFIDENTIAL Thread dumps inregular intervals Overhead depends on sampling interval relatively small overhead can be used for unknown code Injection of measurement code Overhead depends on speed of measurement code accuracy (we measure each execution) we can modify the code also INSTRUMENTATION c() b() a() main() SAMPLING c() b() a() main()
- 23. 23CONFIDENTIAL Thread dumps inregular intervals Overhead depends on sampling interval relatively small overhead can be used for unknown code accuracy (probability-based approach) triggers JVM safe-points Injection of measurement code Overhead depends on speed of measurement code accuracy (we measure each execution) we can modify the code also relatively big overhead we must know the code we are instrumenting INSTRUMENTATION c() b() a() main() SAMPLING c() b() a() main()
- 24. 24CONFIDENTIAL How to capturethread dump 1. jstack -l JAVA_PID 2. ManagementFactory.getThreadMXBean() .dumpAllThreads(true, true); 3. JVMTI AsyncGetCallTrace SAMPLING
- 25. 25CONFIDENTIAL How to capturethread dump 1. jstack -l JAVA_PID 2. ManagementFactory.getThreadMXBean() .dumpAllThreads(true, true); 3. JVMTI AsyncGetCallTrace SAMPLING JVM goes to safe-point • Application threads are paused • We never see the code where safe-point never happens Does not trigger safe-points
- 26. 26CONFIDENTIAL How to capturethread dump 1. jstack -l JAVA_PID 2. ManagementFactory.getThreadMXBean() .dumpAllThreads(true, true); 3. JVMTI AsyncGetCallTrace SAMPLING Doesn’t trigger safe-points github.com/jvm-profiling-tools/honest-profiler JVM goes to safe-point • Application threads are paused • We never see the code where safe-point never happens
- 27. 27CONFIDENTIAL Safe-points > jstack –lJAVA_PID Total time for which application threads were stopped: 0.0132329 seconds, Stopping threads took: 0.0007617 seconds Total time for which application threads were stopped: 0.0002887 seconds, Stopping threads took: 0.0000385 seconds -XX:+PrintGCApplicationStoppedTime -XX:+PrintSafepointStatistics -XX:PrintSafepointStatisticsCount=1
- 28.
- 29. 29CONFIDENTIAL INSTRUMENTATION .java source code dropwizard metrics Perf4J longstart = System.currentTimeInMillis(); // Your code goes here long finish = System.currentTimeInMillis(); System.out.println(start - finish);
- 30. 30CONFIDENTIAL INSTRUMENTATION .java .class source codebyte code compilation dropwizard metrics Perf4J long start = System.currentTimeInMillis(); // Your code goes here long finish = System.currentTimeInMillis(); System.out.println(start - finish);
- 31. 31CONFIDENTIAL proxy classes generation INSTRUMENTATION .java.class source code byte code compilation AspectJ compiler dropwizard metrics Perf4J long start = System.currentTimeInMillis(); // Your code goes here long finish = System.currentTimeInMillis(); System.out.println(start - finish);
- 32. 32CONFIDENTIAL proxy classes generation INSTRUMENTATION AspectJ compiler .java.class source code byte code byte code in runtime compilation loading rt.jar lib/ext bootstrap extension classpath application dropwizard metrics Perf4J long start = System.currentTimeInMillis(); // Your code goes here long finish = System.currentTimeInMillis(); System.out.println(start - finish);
- 33. 33CONFIDENTIAL byte code inruntime rt.jar lib/ext bootstrap extension classpath application proxy classes generation Frameworks INSTRUMENTATION .java .class source code byte code compilation loading AspectJ compiler ASM Javassist CGLibAspectJ BCEL dropwizard metrics Perf4J long start = System.currentTimeInMillis(); // Your code goes here long finish = System.currentTimeInMillis(); System.out.println(start - finish);
- 34. 34CONFIDENTIAL proxy classes generation Frameworks INSTRUMENTATION .java.class source code byte code compilation loading AspectJ compiler ASM Javassist CGLibAspectJ BCEL Custom ClassLoader dropwizard metrics Perf4J byte code in runtime rt.jar lib/ext bootstrap extension classpath custom application long start = System.currentTimeInMillis(); // Your code goes here long finish = System.currentTimeInMillis(); System.out.println(start - finish);
- 35. 35CONFIDENTIAL proxy classes generation FrameworksJavaagents INSTRUMENTATION .java .class source code byte code compilation loading AspectJ compiler ASM Javassist CGLibAspectJ BCEL Custom ClassLoader dropwizard metrics Perf4J byte code in runtime rt.jar lib/ext bootstrap extension classpath custom application long start = System.currentTimeInMillis(); // Your code goes here long finish = System.currentTimeInMillis(); System.out.println(start - finish);
- 36. 36CONFIDENTIAL > java –jar-agentlib:agent.dll app.jar> java –jar -agentlib:agent.jar app.jar JAVA AGENTS Use for deep dive into JVM • Has access to the JVM state, can receive JVMTI events • Independent from JVM (not interrupted by GC, can collect debug information between safe-points, etc.) API • JVMTI (C++ native interface of the JVM) Use for byte-code modification • Allows to transform byte-code before it is loaded by ClassLoader • Follows JVM lifecycle (suspended by GC, etc.) API • java.lang.instrument, java.lang.management Java C++
- 37. 37CONFIDENTIAL AGENT EXAMPLES HPROF Javaprofiler JDWP Java debugger JRebel/XRebel • https://zeroturnaround.com/software/jrebel/ -agentlib:hprof[=options] ToBeProfiledClass -agentlib:jdwp=transport=dt_socket,address=localhost:9009,server=y,suspend=y
- 38. 38CONFIDENTIAL public class DemoAgent(){ public static void premain(String args, Instrumentation instr) { instr.addTransformer(new ClassLoadingLogger()); } } public class ClassLoadingLogger implements ClassFileTransformer { public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException { System.out.println(className); return classfileBuffer; } } Manifest-Version: 1.0 Agent-Class: com.example.DemoAgent Premain-Class: com.example.DemoAgent > java –jar –agentlib:agent.jar app.jar
- 39. 39CONFIDENTIAL public class DemoAgent(){ public static void premain(String args, Instrumentation instr) { instr.addTransformer(new ClassLoadingLogger()); } } public class ClassLoadingLogger implements ClassFileTransformer { public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException { System.out.println(className); return classfileBuffer; } } Manifest-Version: 1.0 Agent-Class: com.example.DemoAgent Premain-Class: com.example.DemoAgent > java –jar –agentlib:agent.jar app.jar
- 40. 40CONFIDENTIAL public class DemoAgent(){ public static void premain(String args, Instrumentation instr) { instr.addTransformer(new ClassLoadingLogger()); } } public class ClassLoadingLogger implements ClassFileTransformer { public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException { System.out.println(className); return classfileBuffer; } } Manifest-Version: 1.0 Agent-Class: com.example.DemoAgent Premain-Class: com.example.DemoAgent > java –jar –agentlib:agent.jar app.jar
- 41. 41CONFIDENTIAL public class DemoAgent(){ public static void premain(String args, Instrumentation instr) { instr.addTransformer(new ClassLoadingLogger()); } } public class ClassLoadingLogger implements ClassFileTransformer { public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException { System.out.println(className); return classfileBuffer; } } Manifest-Version: 1.0 Agent-Class: com.example.DemoAgent Premain-Class: com.example.DemoAgent > java –jar –agentlib:agent.jar app.jar
- 42.
- 43.
- 44.
- 45. 45CONFIDENTIAL JVM ClassLoader Class A Class B ClassC Agent ClassFile Transformer 1. premain 2. addTransformer 3. load class
- 46. 46CONFIDENTIAL JVM ClassLoader Class A Class B ClassC Agent ClassFile Transformer 1. premain 2. addTransformer 3. load class 4. transform Class A
- 47. 47CONFIDENTIAL JVM ClassLoader Class A Class B ClassC Agent ClassFile Transformer Byte code manipulation library 1. premain 2. addTransformer 3. load class 5. modify byte code 4. transform Class A
- 48. 48CONFIDENTIAL JVM ClassLoader Class A Class B ClassC Agent ClassFile Transformer Byte code manipulation library 1. premain 2. addTransformer 3. load class 5. modify byte code 6. redefine class Class A* 4. transform Class A
- 49.
- 50.
- 51. 51CONFIDENTIAL JAVA AGENT +JAVASSIST LIVE DEMO https://github.com/kslisenko/java-performance/tree/master/java-agent
- 52.
- 53. 53CONFIDENTIAL DISTRIBUTED SYSTEM Server 1 DBServer2 DBServer 3 HTTP HTTP HTTP
- 54. 54CONFIDENTIAL LOOKING GOOD Responses HTTP 200 150ms HTTP200 150ms Server 1 DBServer 2 DBServer 3 HTTP HTTP HTTP
- 55. 55CONFIDENTIAL SOMETHING WENT WRONG Responses HTTP200 150ms HTTP 200 270ms HTTP 200 270ms HTTP 200 150ms Server 1 DBServer 2 DBServer 3 HTTP HTTP HTTP
- 56. 56CONFIDENTIAL FAIL Server 1 DBServer 2 DBServer3HTTP 500 timeout Responses HTTP HTTP HTTP HTTP 200 150ms HTTP 200 270ms HTTP 200 270ms HTTP 200 150ms Frustrated user
- 57. 57CONFIDENTIAL IDENTIFYING PERFORMANCE PROBLEM HTTP500 timeout Responses HTTP 200 150ms HTTP 200 270ms HTTP 200 270ms HTTP 200 150ms Header req-id: 1 Header req-id: 1 Header req-id: 1 Server 1 DBServer 2 DBServer 3 HTTP HTTP HTTP Trace propagation Frustrated user
- 58. 58CONFIDENTIAL IDENTIFYING PERFORMANCE PROBLEM HTTP500 timeout Responses HTTP 200 150ms HTTP 200 270ms HTTP 200 270ms HTTP 200 150ms Req-1 12:45:31.000 150 ms Req-1 12:45:31.010 130 ms Header req-id: 1 Header req-id: 1 Header req-id: 1 Req-1 12:45:31.020 120 ms Server 1 DBServer 2 DBServer 3 HTTP HTTP HTTP Trace propagation Frustrated user
- 59. 59CONFIDENTIAL TRACE EXAMPLE 1 http://server1/service http://server2/service server2 toDB business logic http://server3/service server3 to DB business logic 150 ms 120 ms 80 ms 30 ms 130 ms 100 ms 20 ms http://server1/service http://server2/service server2 to DB business logic http://server3/service server3 to DB business logic 120 ms 80 ms 30 ms 130 ms 100 ms 20 ms 270 ms HTTP 200 150ms HTTP 200 270ms
- 60. 60CONFIDENTIAL TRACE EXAMPLE 2 http://server1/service http://server2/service server2 toDB business logic http://server3/service server3 to DB business logic 150 ms 120 ms 80 ms 30 ms 130 ms 100 ms 20 ms http://server1/service http://server2/service server2 to DB business logic http://server3/service server3 to DB 120 ms 80 ms 30 ms 370 ms 350 ms 500 ms timeout HTTP 200 150ms HTTP 500 timeout
- 61. 61CONFIDENTIAL “When systems involvenot just dozens of subsystems but dozens of engineering teams, even our best and most experienced engineers routinely guess wrong about the root cause of poor end-to-end performance.” Google Dapper https://research.google.com/pubs/pub36356.html
- 62. 62CONFIDENTIAL GOOGLE DAPPER Use cases 1.Identify performance problems across multiple teams and services 2. Build dynamic environment map Requirements 1. Low overhead – no impact on running services 2. Application-level transparency* – programmers should not need to be aware of the tracing system 3. Scalability *They instrumented Google Search almost without modifications
- 63. 63CONFIDENTIAL GOOGLE DAPPER: TRACESAND SPANS
- 64.
- 65. 65CONFIDENTIAL GOOGLE DAPPER: TECHNICALDETAILS Technical facts 1. Adaptive sampling 2. 1TB/day to BigTable 3. API + MapReduce 4. Instrumentation of common Google libraries Issues and limitations 1. Request buffering 2. Batch jobs 3. Queued requests 4. Relative latency
- 66. 66CONFIDENTIAL WANT LIKE INGOOGLE?
- 67. 67CONFIDENTIAL COMMERCIAL Magic Quadrant forApplication Performance Monitoring Suites (21 December 2016) OPEN-SOURCE Java Performance Monitoring: 5 Open Source Tools You Should Know (19 January 2017) www.stagemonitor.org github.com/naver/pinpoint www.moskito.org glowroot.org kamon.io zipkin.io https://www.gartner.com/doc/reprints?id=1-3OGTPY9&ct=161221 https://dzone.com/articles/java-performance- monitoring-5-open-source-tools-you-should-know
- 68.
- 69. 69CONFIDENTIAL ZIPKIN (SPRING CLOUDSLEUTH) Server 1 Server 2 HTTPHTTP transport storage User interface API http://zipkin.io/pages/architecture.html Instrumented libraries Send traces and spans Trace id Trace id
- 70. 70CONFIDENTIAL ZIPKIN (SPRING CLOUDSLEUTH) HTTP http://zipkin.io/pages/architecture.html Server 1 Server 2 HTTPHTTP transport storage User interface API Instrumented libraries Send traces and spans Trace id Trace id
- 71. 71CONFIDENTIAL ZIPKIN (SPRING CLOUDSLEUTH) HTTP http://zipkin.io/pages/architecture.html Instrumented libraries Server 1 Server 2 HTTPHTTP transport storage User interface API Send traces and spans Trace id Trace id
- 72. 72CONFIDENTIAL Backend DEMO APPLICATION Frontend Backend HTTP HTTP Democases 1. HTTP calls Spring boot browser 1 1 github.com/kslisenko/java-performance
- 73. 73CONFIDENTIAL Backend DEMO APPLICATION Frontend Backend HTTP JMS HTTP Democases 1. HTTP calls 2. JMS Spring boot chat queue JMS browser 1 1 2 github.com/kslisenko/java-performance
- 74. 74CONFIDENTIAL Backend DEMO APPLICATION Frontend Backend HTTP TCP/IP customprotocol JMS HTTP Demo cases 1. HTTP calls 2. JMS 3. Custom protocol (TCP/IP) Spring boot chat queue JMS browser 1 1 2 3 github.com/kslisenko/java-performance
- 75. 75CONFIDENTIAL Backend DEMO APPLICATION Frontend MySQL Backend HTTP TCP/IP custom protocol JMS HTTP Democases 1. HTTP calls 2. JMS 3. Custom protocol (TCP/IP) 4. DB, JDBC, Hibernate Spring boot chat queue JMS browser 1 1 2 3 4 github.com/kslisenko/java-performance
- 76. 76CONFIDENTIAL Backend DEMO APPLICATION Frontend MySQL Backend HTTP TCP/IP custom protocol JMS HTTP Democases 1. HTTP calls 2. JMS 3. Custom protocol (TCP/IP) 4. DB, JDBC, Hibernate 5. Exceptions 6. Async invocations – New threads – ExecutorService – CompletableFuture Spring boot chat queue JMS browser 51 1 2 3 4 6 github.com/kslisenko/java-performance
- 77. 77CONFIDENTIAL DYNATRACE + ZIPKIN LIVEDEMO github.com/kslisenko/java-performance
- 78. 78CONFIDENTIAL CONCLUSION 1. Make itwork 2. Make it right 3. Make if fast
- 79. 79CONFIDENTIAL REFERENCES Metric libraries Perf4J https://github.com/perf4j/perf4j Metricshttp://metrics.dropwizard.io Servo https://github.com/Netflix/servo Byte-code modification with JAVASSIST https://blog.newrelic.com/2014/09/29/diving-bytecode- manipulation-creating-audit-log-asm-javassist https://www.youtube.com/watch?v=39kdr1mNZ_s Java Agents https://www.slideshare.net/arhan/oredev-2015-taming-java- agents http://www.barcelonajug.org/2015/04/java-agents.html Profiling https://blog.codecentric.de/en/2011/10/measure-java- performance-sampling-or-instrumentation/ https://blog.codecentric.de/en/2014/10/profiler-tell-truth- javaone/ https://www.youtube.com/watch?v=YCC-CpTE2LU&t=2312s https://www.slideshare.net/aragozin/java-black-box-profiling https://www.slideshare.net/aragozin/java-profiling-diy- jugmskru-2016 Safe-points http://blog.ragozin.info/2012/10/safepoints-in-hotspot- jvm.html https://www.cberner.com/2015/05/24/debugging-jvm- safepoint-pauses/
- 80.