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By: a guest on May 22nd, 2012  |  syntax: None  |  size: 1.52 KB  |  hits: 20  |  expires: Never
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  1. Garbage Collector: CMS abort preclean issue?
  2. Here are my GC params:
  3.  
  4.  
  5. -Dfile.encoding=UTF-8
  6.   -Duser.timezone=US/Eastern
  7.   -Dsun.net.inetaddr.ttl=60
  8.   -Dsun.net.inetaddr.negative.ttl=60
  9.   -Xms1024m
  10.   -Xmx1536m
  11.   -Xss512k
  12.   -verbose:gc  
  13.   -Xloggc:$CATALINA_BASE/logs/gc_log
  14.   -XX:+DisableExplicitGC
  15.   -XX:+HeapDumpOnOutOfMemoryError
  16.   -XX:+PrintGCDetails
  17.   -XX:+PrintGCTimeStamps
  18.   -XX:+UseConcMarkSweepGC
  19.   -XX:+UseParNewGC
  20.   -XX:CMSInitiatingOccupancyFraction=50
  21.   -XX:GCTimeRatio=99
  22.   -XX:MaxNewSize=512m
  23.   -XX:MaxTenuringThreshold=30
  24.   -XX:NewSize=512m
  25.   -XX:SurvivorRatio=6
  26.   -XX:TargetSurvivorRatio=90
  27.  
  28. **495747.455: [CMS-concurrent-mark-start]
  29. 495749.159: [CMS-concurrent-mark: 1.705/1.705 secs] [Times: user=1.91 sys=0.05, real=1.71 secs]
  30. 495749.159: [CMS-concurrent-preclean-start]
  31. 495749.166: [CMS-concurrent-preclean: 0.006/0.007 secs] [Times: user=0.01 sys=0.00, real=0.00 secs]
  32. 495749.166: [CMS-concurrent-abortable-preclean-start]
  33. 495752.728: [GC 495752.728: [ParNew: 432226K->29458K(458752K), 0.0462900 secs] 1419590K->1016821K(1507328K), 0.0464200 secs] [Times: user=0.08 sys=0.00, real=0.04 secs]
  34.  CMS: abort preclean due to time 495754.230: [CMS-concurrent-abortable-preclean: 2.067/5.063 secs] [Times: user=2.43 sys=0.11, real=5.06 secs]
  35. 495754.230: [GC[YG occupancy: 146431 K (458752 K)]495754.230: [Rescan (parallel) , 0.0446310 secs]495754.275: [weak refs processing, 0.0000080 secs] [1 CMS-remark: 987363K(1048576K)] 1133794K(1507328K), 0.0447400 secs] [Times: user=0.07 sys=0.00, real=0.05 secs]**
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