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Warsjawa profiling
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Transcript

  • 1. JVM PROFILING Michał Warecki michal.warecki@gmail.com michalwarecki.blogspot.com Jakub Kubrynski jkubrynski@gmail.com www.kubrynski.com
  • 2. WHO WE ARE?
  • 3. WHY?
  • 4. - wprowadzenie *nix tools JDK tools VisualVM JMC Disassembler + JIT JProfiler GC tuning
  • 5. ANATOMY ------------------------------------------APPLICATION SYSTEM LIBRARIES SYSTEM CALLS KERNEL HARDWARE BOTTOM-UP JVM TOP-DOWN FRAMEWORKS
  • 6. MEMORY MEMORIES ------------------------------------------EDEN SURVIV. SURVIV. FROM TO YOUNG GENERATION HEAP TENURED PERM GEN CODE CACHE CALL STACK OLD GEN METHOD AREA NATIVE AREA NON-HEAP
  • 7. t u yo la ct je b o
  • 8. GC ROOTS
  • 9. - shallow - deep - retained
  • 10. SIZE MATTERS ------------------------------------------Obj 3 GC root Obj 4 Obj 1 Obj 2
  • 11. - NEW RUNNABLE BLOCKED WAITING TIMED_WAITING TERMINATED