WebSphere Application Server & Liberty

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  • 1.  performance problem- monitor contention on thread dumps

    Posted Thu September 05, 2019 01:04 AM
    Hi,

    we are facing performance issue after few days, on analyzing we did not seen any issue with memory or GC...

    on analyzing core dumps, we are seeing montitor contention on below trace...can any one help me please.

    we are using AIX standalone web sphere 9.0.0.8 Base and java 8.0.5.37

    VM thread list lock (0x0000010010145470): Flat locked by "[osthread]" (native thread ID:0x2090021), entry count 1
    3LKWAITERQ Waiting to enter:
    3LKWAITER "JIT-SamplerThread" (J9VMThread:0x000000003001CA00)
    2LKREGMON VM exclusive access lock (0x0000010010145508): <unowned>
    VM monitor table lock (0x000001001138D738): Flat locked by "[osthread]" (native thread ID:0x2090021), entry count 1
    2LKREGMON VM mem segment list lock (0x000001001138D7D0): <unowned>
    2LKREGMON VM mem segment list lock (0x000001001138D868): <unowned>

    1XMTHDINFO Thread Details
    NULL
    3XMTHREADINFO Anonymous native thread
    3XMTHREADINFO1 (native thread ID:0x2090021, native priority: 0x0, native policy:UNKNOWN)
    3XMTHREADINFO3 Native callstack:
    4XENATIVESTACK (0x0900000000D55634 [libj9prt29.so+0x66634])
    4XENATIVESTACK protectedStartDo+0x30 (0x0900000000DDF634 [libj9dmp29.so+0x19634])
    4XENATIVESTACK (0x0900000000D47328 [libj9prt29.so+0x58328])
    4XENATIVESTACK writeThreadsWithNativeStacks__18JavaCoreDumpWriterFv+0xaa0 (0x0900000000DDF2C4 [libj9dmp29.so+0x192c4])
    4XENATIVESTACK protectedWriteThreadsWithNativeStacks+0x10 (0x0900000000DDD094 [libj9dmp29.so+0x17094])
    4XENATIVESTACK (0x0900000000D47328 [libj9prt29.so+0x58328])
    4XENATIVESTACK writeThreadSection__18JavaCoreDumpWriterFv+0x168 (0x0900000000DD85EC [libj9dmp29.so+0x125ec])
    4XENATIVESTACK protectedWriteSection+0x28 (0x0900000000DD5E0C [libj9dmp29.so+0xfe0c])
    4XENATIVESTACK (0x0900000000D47328 [libj9prt29.so+0x58328])
    4XENATIVESTACK __ct__18JavaCoreDumpWriterFPCcP16J9RASdumpContextP14J9RASdumpAgent+0x514 (0x0900000000DD4D98 [libj9dmp29.so+0xed98])
    4XENATIVESTACK runJavadump+0x24 (0x0900000000DE5B28 [libj9dmp29.so+0x1fb28])
    4XENATIVESTACK doJavaDump+0xcc (0x0900000000DCAC30 [libj9dmp29.so+0x4c30])
    4XENATIVESTACK protectedDumpFunction+0x34 (0x0900000000DD19B8 [libj9dmp29.so+0xb9b8])
    4XENATIVESTACK (0x0900000000D47328 [libj9prt29.so+0x58328])
    4XENATIVESTACK runDumpAgent+0x75c (0x0900000000DD1680 [libj9dmp29.so+0xb680])
    4XENATIVESTACK triggerDumpAgents+0x3d8 (0x0900000000E1105C [libj9dmp29.so+0x4b05c])
    4XENATIVESTACK sigQuitHandler+0xe4 (0x0900000002858728 [libjclse29.so+0x3d728])
    4XENATIVESTACK (0x0900000000D47328 [libj9prt29.so+0x58328])
    4XENATIVESTACK sigQuitWrapper+0x44 (0x09000000028584C8 [libjclse29.so+0x3d4c8])
    4XENATIVESTACK (0x0900000000D4A830 [libj9prt29.so+0x5b830])
    4XENATIVESTACK (0x0900000000D4AABC [libj9prt29.so+0x5babc])
    4XENATIVESTACK (0x0900000000CD2A84 [libj9thr29.so+0x3a84])
    4XENATIVESTACK _pthread_body+0xf0 (0x09000000004F9E14 [libpthreads.a+0x3e14])
    NULL


  • 2.  RE: performance problem- monitor contention on thread dumps

    Posted Thu September 12, 2019 05:40 AM
    Hi Venkat,

      Wich version of AIX do you have?

    regards,

    ------------------------------
    Gabriel Aberasturi
    IT Architec
    Grupo Versia
    Baracaldo
    34944724425
    ------------------------------

    Original Message


  • 3.  RE: performance problem- monitor contention on thread dumps

    Posted Thu September 12, 2019 05:51 AM
    Edited by venkat krish Thu September 12, 2019 05:51 AM
    thanks Gabriel for the responce, AIX version is
    # oslevel -s
    7100-03-04-1441



    Original Message


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