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Profiling
This document discusses Java profiling and provides an overview of Java memory, garbage collection, common memory problems, profiling tools, and a live demo. It begins with introductions and then covers JVM basics like memory areas, object layout, and garbage collection before discussing issues like memory leaks, I/O problems, and deadlocks. Tools covered include Linux utilities as well as JDK tools and profilers. The document concludes with a thank you and a link to view a live demo on GitHub.
Profiling
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- 5. - jvm basics -problems - tools - demo - questions
- 7. -------------------------------------------------------------------------------------- MEMORY MEMORIESMEMORY MEMORIES EDEN SURVIV. FROM SURVIV. TO TENURED PERM GEN CODE CACHE YOUNGGENERATION OLD GEN METHOD AREA NATIVE AREA HEAP NON-HEAP CALL STACK
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- 11. ------------------------------------------- SIZE MATTERS Obj 1 Obj3 Obj 4 Obj 2 GC root
- 12. - NEW - RUNNABLE -BLOCKED - WAITING - TIMED_WAITING - TERMINATED
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- 18. ------------------------------------------- *NIX TOOLS - top/htop -iostat - netstat - free
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- 20. ------------------------------------------- JDK TOOLS - jps -jinfo - jmap - jstat - jhat - jstack - VisualVM (jvisualvm)
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