14 Replies Latest reply on Aug 31, 2010 6:29 AM by 791266

    Long pauses

    843829
      Hi,

      I'm trying to tune the JVM options for a JAVA app that requires low pauses. After playing around with several diferent combinations I still can not get a setup that will not give an occasional very long pause.

      Here's an example of a long pause from the stdout log:
      2007-11-24 07:44:29| occupancy=0.6494621
      2007-11-24 07:44:29| initiatingOccupancy=0.6800000
      2007-11-24 07:44:32| CMSCollector shouldConcurrentCollect: 64459.941
      2007-11-24 07:44:32| time_until_cms_gen_full 1986.2853957
      2007-11-24 07:44:32| free=4410787008
      2007-11-24 07:44:32| contiguous_available=1888036816
      2007-11-24 07:44:32| promotion_rate=1.98556e+06
      2007-11-24 07:44:32| cms_allocation_rate=0
      2007-11-24 07:44:32| occupancy=0.6494621
      2007-11-24 07:44:32| initiatingOccupancy=0.6800000
      2007-11-24 07:44:32| Total time for which application threads were stopped: *46.1601130 seconds*
      2007-11-24 07:44:32| CMSCollector shouldConcurrentCollect: 64461.180
      2007-11-24 07:44:32| time_until_cms_gen_full 1986.2853957
      2007-11-24 07:44:32| free=4410787008
      2007-11-24 07:44:32| contiguous_available=1888036816
      2007-11-24 07:44:32| promotion_rate=1.98556e+06
      2007-11-24 07:44:32| cms_allocation_rate=0
      2007-11-24 07:44:32| occupancy=0.6494621
      2007-11-24 07:44:32| initiatingOccupancy=0.6800000
      2007-11-24 07:44:32| CMSCollector shouldConcurrentCollect: Total time for which application threads were stopped: 0.0048
      4

      The pause of 46 seconds is not good for the application. It would be OK to have an occasional 5 sec pause but not 46 seconds.

      I've been through likely all JVM tunning papers, blogs and previus postings to this forum.

      BTW I know that some of the JVM options I'm setting are already the default but it helps me keep track of which options I tried.

      Can anyone help?


      Here are some details:

      Platform: Linux 2.6.9-42.0.10.ELsmp #1 SMP Tue Feb 27 09:40:21 EST 2007 x86_64 x86_64 x86_64 GNU/Linux
      16GB of physical memory, 2 x dual core CPUs AMD 1.86GHz

      java version "1.6.0_02"
      Java(TM) SE Runtime Environment (build 1.6.0_02-b05)
      Java HotSpot(TM) Server VM (build 1.6.0_02-b05, mixed mode)

      JVM options:

      -Xbatch -XX:-DontCompileHugeMethods -XX:CMSMaxAbortablePrecleanTime=10000
      -XX:+UseConcMarkSweepGC
      -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=68
      -XX:+UseParNewGC -XX:SurvivorRatio=15
      -XX:+CMSConcurrentMTEnabled -XX:ParallelGCThreads=4 -XX:+CMSParallelSurvivorRemarkEnabled -XX:InitialTenuringThreshold=1 -XX:MaxTenuringThreshold=8 -XX:TargetSurvivorRatio=90 -XX:ThreadPriorityPolicy=0 -XX:+AggressiveOpts -XX:CMSTriggerRatio=65 -XX:+AlwaysActAsServerClassMachine -XX:+UseCMSCompactAtFullCollection
      -XX:CMSFullGCsBeforeCompaction=0 -XX:+CMSPermGenSweepingEnabled
      -XX:+CMSClassUnloadingEnabled -XX:+CMSParallelRemarkEnabled -XX:PrintCMSStatistics=1 -XX:+PrintCMSInitiationStatistics
      -XX:+PrintGCApplicationStoppedTime -verbose:gc -XX:+PrintTenuringDistribution -XX:+PrintGCDetails -XX:+UseTLAB
      -Xms13000m -Xmx13000m -XX:MaxNewSize=1000m -XX:NewSize=1000m -XX:ThreadStackSize=128
        • 1. Re: Long pauses
          843829
          Please apply "-XX:+PrintGCDetails -XX:+PrintGCTimeStamps" and post the result.
          • 2. Re: Long pauses
            843829
            These options are already enabled. The GC timestamps are masked by our logging system but all the verbose from the GC details should be in my previous post.

            Is there any specific info you are looking for? The entire log file is very large likely too large to post here.

            //
            • 3. Re: Long pauses
              843829
              Sorry, your JVM option list is so long that i couldn't identify it. :)

              I would like to see following format:
              2.593: [GC [1 CMS-initial-mark: 259838K(491520K)] 263365K(521024K), 0.0023419 secs]
              2.596: [CMS-concurrent-mark-start]
              4.357: [CMS-concurrent-mark: 0.655/1.761 secs]
              4.357: [CMS-concurrent-preclean-start]
              4.419: [CMS-concurrent-preclean: 0.040/0.062 secs]
              4.419: [CMS-concurrent-abortable-preclean-start]
              4.428: [CMS-concurrent-abortable-preclean: 0.007/0.010 secs
              4.588: [GC[YG occupancy: 3619 K (29504 K)]4.588: [Rescan (parallel) , 0.0148329 secs]4.603: [weak refs processing, 0.0000291 secs] [1 CMS-remark: 422939K(491520K)] 426559K(521024K), 0.0149645 secs]
              4.688: [CMS-concurrent-sweep-start]
              5.425: [CMS-concurrent-sweep: 0.302/0.737 secs]
              5.425: [CMS-concurrent-reset-start]
              5.489: [CMS-concurrent-reset: 0.014/0.064 secs]
              Can you post above format of log which matches some "long" gc time.

              Anyway, I'm not sure which combination of options you've tried. Just let me scratch the surface.
              - Would you try lower CMSInitiatingOccupancyFraction value? to 55 or something?
              - Would you try CompactAtFullCollection option off?
              - Would you try CMSIncrementalMode instead of CompactAtFullCollection?

              Google this forum with "CMS collector compaction".
              • 4. Re: Long pauses
                843829
                Dion_Cho,

                I am running my test again with CompactAtFullCollection option off.

                I've played enough with the occupancy fraction and I don't believe this is the culprit although it will definitely cause problems if it's set too high.

                I also already played with ICMS, perhaps not enough but I don't think this will help either.

                I turned diagnostics on so I can create another log file in the format you requested. The test is running now, I can't say how long it will take to get a long pause but it will ... I will post the results then.

                Thanks,

                PL
                • 5. Re: Long pauses
                  843829
                  Here's another big pause: I have the whole logfile if anyone is interested but here's the region where the pause happens. THere's nothing in the log that gives me a clue of what's doing when the pause happens.

                  7741.587: [GC 7741.588: [ParNew
                  Desired survivor size 94371840 bytes, new threshold 5 (max 8)
                  - age   1:   24412472 bytes,   24412472 total
                  - age   2:   21038144 bytes,   45450616 total
                  - age   3:   20597840 bytes,   66048456 total
                  - age   4:   19746928 bytes,   85795384 total
                  - age   5:   19062040 bytes,  104857424 total
                  : 921600K->102400K(921600K), 0.3088080 secs] 8269812K->7471051K(13209600K), 0.3093120 secs]
                  Total time for which application threads were stopped: 0.3196070 seconds
                  7752.152: [GC 7752.152: [ParNew
                  Desired survivor size 94371840 bytes, new threshold 5 (max 8)
                  - age   1:   22719688 bytes,   22719688 total
                  - age   2:   22518840 bytes,   45238528 total
                  - age   3:   20254832 bytes,   65493360 total
                  - age   4:   19675160 bytes,   85168520 total
                  - age   5:   18701336 bytes,  103869856 total
                  : 921600K->102400K(921600K), 0.3118630 secs] 8290251K->7495915K(13209600K), 0.3124020 secs]
                  Total time for which application threads were stopped: 0.3217890 seconds
                  7762.887: [GC 7762.887: [ParNew
                  Desired survivor size 94371840 bytes, new threshold 5 (max 8)
                  - age   1:   22629096 bytes,   22629096 total
                  - age   2:   21318736 bytes,   43947832 total
                  - age   3:   21733472 bytes,   65681304 total
                  - age   4:   19664776 bytes,   85346080 total
                  - age   5:   19511384 bytes,  104857464 total
                  : 921600K->102400K(921600K), 0.3134700 secs] 8315115K->7518690K(13209600K), 0.3139990 secs]
                  Total time for which application threads were stopped: 0.3213620 seconds
                  Total time for which application threads were stopped: 0.0036340 seconds
                  Total time for which application threads were stopped: 0.0033670 seconds
                  7773.727: [GC 7773.727: [ParNew
                  Desired survivor size 94371840 bytes, new threshold 5 (max 8)
                  - age   1:   22024192 bytes,   22024192 total
                  - age   2:   20501928 bytes,   42526120 total
                  - age   3:   20502032 bytes,   63028152 total
                  - age   4:   21021552 bytes,   84049704 total
                  - age   5:   19313504 bytes,  103363208 total
                  : 921600K->102400K(921600K), 0.3165940 secs] 8337890K->7543482K(13209600K), 0.3171480 secs]
                  Total time for which application threads were stopped: 0.3241270 seconds
                  Total time for which application threads were stopped: 0.0067410 seconds
                  Total time for which application threads were stopped: 0.0038350 seconds
                  Total time for which application threads were stopped: 56.1708090 seconds
                  Total time for which application threads were stopped: 0.0034490 seconds
                  Total time for which application threads were stopped: 0.0039120 seconds
                  Total time for which application threads were stopped: 0.0072940 seconds
                  Total time for which application threads were stopped: 0.0070070 seconds
                  Total time for which application threads were stopped: 0.0089790 seconds
                  Total time for which application threads were stopped: 0.0164470 seconds
                  Total time for which application threads were stopped: 0.0034560 seconds
                  Total time for which application threads were stopped: 0.0033550 seconds
                  Total time for which application threads were stopped: 0.0034270 seconds
                  Total time for which application threads were stopped: 0.0034200 seconds
                  Total time for which application threads were stopped: 0.0032840 seconds
                  • 6. Re: Long pauses
                    843829
                    Try this
                    -Xms1024m -Xmx1024m -XX:PermSize=128m -XX:MaxPermSize=128m -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSParallelRemarkEnabled -XX:CMSInitiatingOccupancyFraction=65 -XX:MaxTenuringThreshold=0 -XX:SurvivorRatio=128 -XX:+PrintGCDetails. 
                    This has worked for me to reduce the pause times. Also could you tell me how often is the pause time of that order is happening. Does it happen after a really long delay? Does it happen after a really long delay or quite frequently.This is an application that processes a million transactions a day and needs very low pause times.
                    • 7. Re: Long pauses
                      843829
                      Thanks for your suggestion. This would not work for me as we really need 24G of heap.

                      If what you meant is to use the same options but with 24G of heap I have already tried that sometime ago and I get pauses much worse than 40->50 secs. This options would let the JVM ergonomics choose the young generation.

                      It would be interesting if anyone know a verbose option that would show me what the JVM was doing during the pause. It was not a Full CMS otherwise we would see it in the logs, it was not a a concurrent mode failure, knowing what it is can help me to try to avoid the situation.

                      CHeers.
                      • 8. Re: Long pauses
                        843829
                        Hi P_Lim,

                        perhaps its this?

                        http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6546278

                        try -XX+UseMembar as option or the newest Java version.

                        Hope it helps

                        Edited by: ARMistice on Dec 1, 2007 11:01 AM

                        Edited by: ARMistice on Dec 1, 2007 11:02 AM
                        • 9. Re: Long pauses
                          843829
                          ARMstice,

                          I think you have the most plausible explanation for my problem. I will experiment with the -XX+UseMembar option (although it seems to penalize performance) but I guess there will be a new JVM release for Java a6 soon as well.

                          THanks.

                          PL
                          • 10. Re: Long pauses
                            843829
                            This post is just to confirm that the -XX+UseMembar option has solved (or at least greatly delayed) the misterious pauses I was getting.

                            Cheers,

                            Paulo/
                            • 11. Re: Long pauses
                              843829
                              We still see unacceptable long pauses after updating our application to 1.5u14. This needs to be addressed since no server application can sit dead for multiple seconds, especially when there is tons of free heap and other memory spaces are looking fine.

                              Thu Dec 13 21:37:18.236 GMT 2007 [INFO] RevalQueue Stats: after every 600 reval events:: total revalEvents = 25182000 reval Q depth = 680
                              75267.284: [GC 75267.285: [ParNew
                              Desired survivor size 32768 bytes, new threshold 0 (max 0)
                              : 16256K->0K(16320K), 0.0242020 secs] 1015559K->1000887K(1572800K), 0.0253560 secs]

                              Total time for which application threads were stopped: 0.0278360 seconds

                              75279.541: [GC 75279.542: [ParNew
                              Desired survivor size 32768 bytes, new threshold 0 (max 0)
                              : 16256K->0K(16320K), 12.4505580 secs] 1017143K->1001495K(1572800K), 12.4520240 secs]

                              Total time for which application threads were stopped: 12.4545130 seconds

                              java.runtime.name = Java(TM) 2 Runtime Environment, Standard Edition
                              java.runtime.version = 1.5.0_14-b03
                              java.specification.name = Java Platform API Specification
                              java.specification.vendor = Sun Microsystems Inc.
                              java.specification.version = 1.5
                              java.vendor = Sun Microsystems Inc.
                              java.vendor.url = http://java.sun.com/
                              java.vendor.url.bug = http://java.sun.com/cgi-bin/bugreport.cgi
                              java.version = 1.5.0_14
                              java.vm.info = mixed mode
                              java.vm.name = Java HotSpot(TM) Server VM
                              java.vm.specification.name = Java Virtual Machine Specification
                              java.vm.specification.vendor = Sun Microsystems Inc.
                              java.vm.specification.version = 1.0
                              java.vm.vendor = Sun Microsystems Inc.
                              java.vm.version = 1.5.0_14-b03
                              line.separator =
                              os.version = 2.4.21-32.0.1.ELhugemem
                              p2p.useSSL = false
                              path.separator = :
                              sun.arch.data.model = 32
                              • 12. Re: Long pauses
                                843829
                                We still see unacceptable long pauses after updating our application to 1.5u14. This needs to be addressed since no server application can sit dead for multiple seconds, especially when there is tons of free heap and other memory spaces are looking fine.

                                Thu Dec 13 21:37:18.236 GMT 2007 [INFO] RevalQueue Stats: after every 600 reval events:: total revalEvents = 25182000 reval Q depth = 680
                                75267.284: [GC 75267.285: [ParNew
                                Desired survivor size 32768 bytes, new threshold 0 (max 0)
                                : 16256K->0K(16320K), 0.0242020 secs] 1015559K->1000887K(1572800K), 0.0253560 secs]

                                Total time for which application threads were stopped: 0.0278360 seconds

                                75279.541: [GC 75279.542: [ParNew
                                Desired survivor size 32768 bytes, new threshold 0 (max 0)
                                : 16256K->0K(16320K), 12.4505580 secs] 1017143K->1001495K(1572800K), 12.4520240 secs]

                                Total time for which application threads were stopped: 12.4545130 seconds

                                java.runtime.name = Java(TM) 2 Runtime Environment, Standard Edition
                                java.runtime.version = 1.5.0_14-b03
                                java.specification.name = Java Platform API Specification
                                java.specification.vendor = Sun Microsystems Inc.
                                java.specification.version = 1.5
                                java.vendor = Sun Microsystems Inc.
                                java.vendor.url = http://java.sun.com/
                                java.vendor.url.bug = http://java.sun.com/cgi-bin/bugreport.cgi
                                java.version = 1.5.0_14
                                java.vm.info = mixed mode
                                java.vm.name = Java HotSpot(TM) Server VM
                                java.vm.specification.name = Java Virtual Machine Specification
                                java.vm.specification.vendor = Sun Microsystems Inc.
                                java.vm.specification.version = 1.0
                                java.vm.vendor = Sun Microsystems Inc.
                                java.vm.version = 1.5.0_14-b03
                                line.separator =
                                os.version = 2.4.21-32.0.1.ELhugemem
                                p2p.useSSL = false
                                path.separator = :
                                sun.arch.data.model = 32
                                This is not a continuation of the current thread, but should be a new thread.
                                If you start a new thread, could you post a larger GC log snippet? Does the
                                occasional ParNew pause display this long pause anomaly, or do the longer
                                ParNew pauses occur in a stretch? Please file a bug with bugs.sun.com
                                if you can still reproduce this problem with the latest update releases of the
                                JVM.
                                • 13. Long pauses of ParNew GC
                                  843829
                                  I encounter same problem, no "promotion failed" tip but ParNew cost more than 20s, the following is the gc log's snapshot:
                                  my jdk version is the latest JDK6u21 on RHEL5.1/IBM x3850 with 16core.
                                  I try to use -X::+UseMemBar, but no effect.

                                  1913.579: [GC 1913.579: [ParNew
                                  Desired survivor size 33554432 bytes, new threshold 2 (max 2)
                                  - age   1:   15459032 bytes,   15459032 total
                                  - age   2:   10545904 bytes,   26004936 total
                                  : 433430K->35393K(458752K), 0.1056850 secs] 6509320K->6122752K(10420224K), 0.1061990 secs] [Times: user=0.83 sys=0.01, real=0.11 secs]
                                  Heap after GC invocations=3850 (full 10):
                                  par new generation total 458752K, used 35393K [0x000000057a000000, 0x000000059a000000, 0x000000059a000000)
                                  eden space 393216K, 0% used [0x000000057a000000, 0x000000057a000000, 0x0000000592000000)
                                  from space 65536K, 54% used [0x0000000596000000, 0x00000005982905c8, 0x000000059a000000)
                                  to space 65536K, 0% used [0x0000000592000000, 0x0000000592000000, 0x0000000596000000)
                                  concurrent mark-sweep generation total 9961472K, used 6087358K [0x000000059a000000, 0x00000007fa000000, 0x00000007fa000000)
                                  concurrent-mark-sweep perm gen total 63128K, used 37802K [0x00000007fa000000, 0x00000007fdda6000, 0x0000000800000000)
                                  }
                                  Total time for which application threads were stopped: 0.1082700 seconds
                                  CMSCollector shouldConcurrentCollect: 1913.685
                                  time_until_cms_gen_full 144.6930408
                                  free=3967091720
                                  contiguous_available=2076692424
                                  promotion_rate=2.45972e+07
                                  cms_allocation_rate=0
                                  occupancy=0.6110903
                                  initiatingOccupancy=0.6500000
                                  initiatingPermOccupancy=0.9200000
                                  Application time: 0.3237750 seconds
                                  CMSCollector shouldConcurrentCollect: 1935.690
                                  time_until_cms_gen_full 144.6930408
                                  free=3967091720
                                  contiguous_available=2076692424
                                  promotion_rate=2.45972e+07
                                  cms_allocation_rate=0
                                  occupancy=0.6110903
                                  initiatingOccupancy=0.6500000
                                  initiatingPermOccupancy=0.9200000
                                  CMSCollector shouldConcurrentCollect: 1937.692
                                  time_until_cms_gen_full 144.6930408
                                  free=3967091720
                                  contiguous_available=2076692424
                                  promotion_rate=2.45972e+07
                                  cms_allocation_rate=0
                                  occupancy=0.6110903
                                  initiatingOccupancy=0.6500000
                                  initiatingPermOccupancy=0.9200000
                                  Total time for which application threads were stopped: 23.8250250 seconds
                                  CMSCollector shouldConcurrentCollect: 1937.834
                                  time_until_cms_gen_full 144.6930408
                                  free=3967091720
                                  contiguous_available=2076692424
                                  promotion_rate=2.45972e+07
                                  cms_allocation_rate=0
                                  occupancy=0.6110903
                                  initiatingOccupancy=0.6500000
                                  initiatingPermOccupancy=0.9200000
                                  Application time: 0.0000880 seconds
                                  Total time for which application threads were stopped: 0.0016130 seconds
                                  CMSCollector shouldConcurrentCollect: 1937.836
                                  time_until_cms_gen_full 144.6930408
                                  free=3967091720
                                  contiguous_available=2076692424
                                  promotion_rate=2.45972e+07
                                  cms_allocation_rate=0
                                  occupancy=0.6110903
                                  initiatingOccupancy=0.6500000
                                  initiatingPermOccupancy=0.9200000
                                  Application time: 0.0000580 seconds
                                  Total time for which application threads were stopped: 0.0004200 seconds
                                  CMSCollector shouldConcurrentCollect: 1937.837
                                  time_until_cms_gen_full 144.6930408
                                  free=3967091720
                                  contiguous_available=2076692424
                                  promotion_rate=2.45972e+07
                                  cms_allocation_rate=0
                                  occupancy=0.6110903
                                  initiatingOccupancy=0.6500000
                                  initiatingPermOccupancy=0.9200000
                                  Application time: 0.0019560 seconds
                                  {Heap before GC invocations=3850 (full 10):
                                  par new generation   total 458752K, used 428609K [0x000000057a000000, 0x000000059a000000, 0x000000059a000000)
                                    eden space 393216K, 100% used [0x000000057a000000, 0x0000000592000000, 0x0000000592000000)
                                    from space 65536K,  54% used [0x0000000596000000, 0x00000005982905c8, 0x000000059a000000)
                                    to   space 65536K,   0% used [0x0000000592000000, 0x0000000592000000, 0x0000000596000000)
                                  concurrent mark-sweep generation total 9961472K, used 6087358K [0x000000059a000000, 0x00000007fa000000, 0x00000007fa000000)
                                  concurrent-mark-sweep perm gen total 63128K, used 37802K [0x00000007fa000000, 0x00000007fdda6000, 0x0000000800000000)
                                  1937.839: [GC 1937.839: [ParNew
                                  Desired survivor size 33554432 bytes, new threshold 2 (max 2)
                                  - age   1:   15389248 bytes,   15389248 total
                                  - age   2:   10280752 bytes,   25670000 total
                                  : 428609K->33832K(458752K), 0.0985530 secs] 6515968K->6131457K(10420224K), 0.0990430 secs] [Times: user=0.77 sys=0.01, real=0.10 secs]
                                  Heap after GC invocations=3851 (full 10):
                                  par new generation total 458752K, used 33832K [0x000000057a000000, 0x000000059a000000, 0x000000059a000000)
                                  eden space 393216K, 0% used [0x000000057a000000, 0x000000057a000000, 0x0000000592000000)
                                  from space 65536K, 51% used [0x0000000592000000, 0x000000059410a2c8, 0x0000000596000000)
                                  to space 65536K, 0% used [0x0000000596000000, 0x0000000596000000, 0x000000059a000000)
                                  concurrent mark-sweep generation total 9961472K, used 6097624K [0x000000059a000000, 0x00000007fa000000, 0x00000007fa000000)
                                  concurrent-mark-sweep perm gen total 63128K, used 37802K [0x00000007fa000000, 0x00000007fdda6000, 0x0000000800000000)
                                  }
                                  Total time for which application threads were stopped: 0.0999980 seconds
                                  CMSCollector shouldConcurrentCollect: 1937.939
                                  time_until_cms_gen_full 4007.5147760
                                  free=3956579920
                                  contiguous_available=2070817568
                                  promotion_rate=885817
                                  cms_allocation_rate=0
                                  occupancy=0.6121208
                                  initiatingOccupancy=0.6500000
                                  initiatingPermOccupancy=0.9200000
                                  Application time: 0.0446810 seconds
                                  Total time for which application threads were stopped: 0.0048440 seconds
                                  CMSCollector shouldConcurrentCollect: 1937.988
                                  time_until_cms_gen_full 4007.5147760
                                  free=3956579920
                                  contiguous_available=2070817568
                                  promotion_rate=885817
                                  cms_allocation_rate=0
                                  occupancy=0.6121208
                                  initiatingOccupancy=0.6500000
                                  initiatingPermOccupancy=0.9200000
                                  Application time: 0.1273720 seconds
                                  {Heap before GC invocations=3851 (full 10):
                                  {Heap before GC invocations=3851 (full 10):
                                  par new generation   total 458752K, used 427048K [0x000000057a000000, 0x000000059a000000, 0x000000059a000000)
                                    eden space 393216K, 100% used [0x000000057a000000, 0x0000000592000000, 0x0000000592000000)
                                    from space 65536K,  51% used [0x0000000592000000, 0x000000059410a2c8, 0x0000000596000000)
                                    to   space 65536K,   0% used [0x0000000596000000, 0x0000000596000000, 0x000000059a000000)
                                  concurrent mark-sweep generation total 9961472K, used 6097624K [0x000000059a000000, 0x00000007fa000000, 0x00000007fa000000)
                                  concurrent-mark-sweep perm gen total 63128K, used 37808K [0x00000007fa000000, 0x00000007fdda6000, 0x0000000800000000)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       
                                  • 14. Re: Long pauses of ParNew GC
                                    791266
                                    >

                                    Please, don't resurrect old threads, and don't hijack. Create a new thread with a description of your problem, and any relevant log files. I'm locking this thread.

                                    Kaj