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0 Replies Latest reply: Sep 19, 2012 9:27 AM by Srinath Menon RSS

Full GC happening very frequently

Srinath Menon Guru
Currently Being Moderated
Hi ,

I have a webcenter portal application which is showing severe performance issues .

Full GC is starting very very frequently and the response time for users is going higher and higher . Have tried using the following set of JVM params :


-Xmn1536m -Xms3072m -Xmx3072m -XX:PermSize=512m -XX:MaxPermSize=512m -Xss128k -XX:SurvivorRatio=6 -XX:ParallelGCThreads=4 -XX:+UseParallelOldGC -XX:+DisableExplicitGC -Dsun.rmi.dgc.server.gcInterval=3600000 -Dsun.rmi.dgc.client.gcInterval=3600000 -XX:-UseAdaptiveSizePolicy -verbosegc -XX:+PrintGCDetails -XX:+HeapDumpOnOutOfMemoryError


But this has not made any difference in either the Full GC or Response time .

Following is the JVM details :


java version "1.6.0_25"
Java(TM) SE Runtime Environment (build 1.6.0_25-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.0-b11, mixed mode)



java.runtime.name = Java(TM) SE Runtime Environment
java.runtime.version = 1.6.0_25-b06
java.security.policy = /oracle/middleware/fmw2/wlserver_10.3/server/lib/weblogic.policy
java.specification.name = Java Platform API Specification
java.specification.vendor = Sun Microsystems Inc.
java.specification.version = 1.6
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 = 1.6.0_25
java.vm.info = mixed mode
java.vm.name = Java HotSpot(TM) 64-Bit 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 = 20.0-b11



GC output is coming as follows :
--------------------------------------------


[GC [PSYoungGen: 1376253K->196597K(1376256K)] 1450517K->401197K(2949120K), 0.3922100 secs] [Times: user=0.75 sys=0.04, real=0.40 secs]
[GC [PSYoungGen: 1376245K->196598K(1376256K)] 1580845K->585184K(2949120K), 0.4512270 secs] [Times: user=0.83 sys=0.07, real=0.45 secs]
[GC [PSYoungGen: 1376246K->196577K(1376256K)] 1764832K->774065K(2949120K), 0.5034000 secs] [Times: user=0.94 sys=0.06, real=0.50 secs]
[GC [PSYoungGen: 1376225K->196597K(1376256K)] 1953713K->960386K(2949120K), 0.5210750 secs] [Times: user=0.98 sys=0.06, real=0.52 secs]
[GC [PSYoungGen: 1376245K->196603K(1376256K)] 2140034K->1150807K(2949120K), 0.5456430 secs] [Times: user=1.03 sys=0.06, real=0.54 secs]
<Sep 19, 2012 5:54:29 PM KST> <Info> <Health> <BEA-310002> <59% of the total memory in the server is free>
[GC [PSYoungGen: 1376251K->196598K(1376256K)] 2330455K->1339367K(2949120K), 0.5762550 secs] [Times: user=1.09 sys=0.06, real=0.58 secs]
[GC [PSYoungGen: 1376246K->196604K(1376256K)] 2519015K->1528539K(2949120K), 0.5871380 secs] [Times: user=1.10 sys=0.07, real=0.59 secs]
[Full GC [PSYoungGen: 196604K->0K(1376256K)] [ParOldGen: 1331934K->1477237K(1572864K)] 1528539K->1477237K(2949120K) [PSPermGen: 292181K->286879K(524288K)], 8.2889180 secs] [Times: user=14.71 sys=0.15, real=8.28 secs]
[Full GC [PSYoungGen: 1179648K->71929K(1376256K)] [ParOldGen: 1477237K->1572862K(1572864K)] 2656885K->1644792K(2949120K) [PSPermGen: 287032K->286837K(524288K)], 5.6158290 secs] [Times: user=10.06 sys=0.06, real=5.61 secs]
[Full GC [PSYoungGen: 1179648K->236338K(1376256K)] [ParOldGen: 1572862K->1572860K(1572864K)] 2752510K->1809199K(2949120K) [PSPermGen: 286980K->286980K(524288K)], 3.8012510 secs] [Times: user=6.64 sys=0.01, real=3.80 secs]
<Sep 19, 2012 5:55:31 PM KST> <Info> <Health> <BEA-310002> <36% of the total memory in the server is free>
[Full GC [PSYoungGen: 1179648K->379138K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->1951998K(2949120K) [PSPermGen: 287106K->287106K(524288K)], 3.9035410 secs] [Times: user=6.88 sys=0.01, real=3.90 secs]
[Full GC [PSYoungGen: 1179648K->495822K(1376256K)] [ParOldGen: 1572860K->1572863K(1572864K)] 2752508K->2068685K(2949120K) [PSPermGen: 287218K->287218K(524288K)], 3.9587990 secs] [Times: user=7.01 sys=0.00, real=3.95 secs]
[Full GC [PSYoungGen: 1179648K->590715K(1376256K)] [ParOldGen: 1572863K->1572861K(1572864K)] 2752511K->2163576K(2949120K) [PSPermGen: 287920K->287920K(524288K)], 4.1819160 secs] [Times: user=7.41 sys=0.01, real=4.18 secs]
[Full GC [PSYoungGen: 1179648K->679951K(1376256K)] [ParOldGen: 1572861K->1572860K(1572864K)] 2752509K->2252811K(2949120K) [PSPermGen: 288010K->288010K(524288K)], 4.1468760 secs] [Times: user=7.37 sys=0.00, real=4.15 secs]
[Full GC [PSYoungGen: 1179648K->759665K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->2332526K(2949120K) [PSPermGen: 288074K->288074K(524288K)], 4.2648680 secs] [Times: user=7.62 sys=0.00, real=4.27 secs]
[Full GC [PSYoungGen: 1179648K->823380K(1376256K)] [ParOldGen: 1572860K->1572862K(1572864K)] 2752508K->2396242K(2949120K) [PSPermGen: 288129K->288129K(524288K)], 4.2886420 secs] [Times: user=7.66 sys=0.01, real=4.29 secs]
<Sep 19, 2012 5:56:33 PM KST> <Info> <Health> <BEA-310002> <18% of the total memory in the server is free>
[Full GC [PSYoungGen: 1179648K->879951K(1376256K)] [ParOldGen: 1572862K->1572863K(1572864K)] 2752510K->2452814K(2949120K) [PSPermGen: 288190K->288190K(524288K)], 4.4630920 secs] [Times: user=7.90 sys=0.01, real=4.46 secs]
[Full GC [PSYoungGen: 1179648K->927061K(1376256K)] [ParOldGen: 1572863K->1572861K(1572864K)] 2752511K->2499922K(2949120K) [PSPermGen: 288231K->288231K(524288K)], 4.4099630 secs] [Times: user=7.90 sys=0.01, real=4.41 secs]
[Full GC [PSYoungGen: 1179648K->966994K(1376256K)] [ParOldGen: 1572861K->1572861K(1572864K)] 2752509K->2539855K(2949120K) [PSPermGen: 288264K->288264K(524288K)], 4.5197100 secs] [Times: user=8.12 sys=0.00, real=4.52 secs]
[Full GC [PSYoungGen: 1179648K->998727K(1376256K)] [ParOldGen: 1572861K->1572863K(1572864K)] 2752509K->2571591K(2949120K) [PSPermGen: 288292K->288292K(524288K)], 4.4924000 secs] [Times: user=8.08 sys=0.00, real=4.49 secs]
[Full GC [PSYoungGen: 1179648K->1027050K(1376256K)] [ParOldGen: 1572863K->1572860K(1572864K)] 2752511K->2599910K(2949120K) [PSPermGen: 288316K->288316K(524288K)], 4.5573910 secs] [Times: user=8.23 sys=0.00, real=4.56 secs]
[Full GC [PSYoungGen: 1179648K->1051227K(1376256K)] [ParOldGen: 1572860K->1572862K(1572864K)] 2752508K->2624090K(2949120K) [PSPermGen: 288336K->288336K(524288K)], 4.5056300 secs] [Times: user=8.13 sys=0.00, real=4.50 secs]
[Full GC [PSYoungGen: 1179648K->1071418K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2644280K(2949120K) [PSPermGen: 288353K->288353K(524288K)], 4.6812220 secs] [Times: user=8.46 sys=0.00, real=4.68 secs]
[Full GC [PSYoungGen: 1179648K->1089390K(1376256K)] [ParOldGen: 1572862K->1572860K(1572864K)] 2752510K->2662250K(2949120K) [PSPermGen: 288368K->288368K(524288K)], 4.9270060 secs] [Times: user=8.97 sys=0.01, real=4.93 secs]
[Full GC [PSYoungGen: 1179648K->1101481K(1376256K)] [ParOldGen: 1572860K->1572863K(1572864K)] 2752508K->2674345K(2949120K) [PSPermGen: 288378K->288378K(524288K)], 5.4054030 secs] [Times: user=9.90 sys=0.01, real=5.40 secs]
[Full GC [PSYoungGen: 1179648K->1113157K(1376256K)] [ParOldGen: 1572863K->1572863K(1572864K)] 2752511K->2686020K(2949120K) [PSPermGen: 288388K->288388K(524288K)], 6.0949180 secs] [Times: user=10.98 sys=0.02, real=6.10 secs]
[Full GC [PSYoungGen: 1179648K->1113470K(1376256K)] [ParOldGen: 1572863K->1572863K(1572864K)] 2752511K->2686333K(2949120K) [PSPermGen: 288388K->288388K(524288K)], 3.9306690 secs] [Times: user=7.13 sys=0.00, real=3.93 secs]
[Full GC [PSYoungGen: 1179648K->1111277K(1376256K)] [ParOldGen: 1572863K->1572862K(1572864K)] 2752511K->2684140K(2949120K) [PSPermGen: 288388K->288388K(524288K)], 4.9575430 secs] [Times: user=9.04 sys=0.01, real=4.96 secs]
[Full GC [PSYoungGen: 1179648K->1111280K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2684142K(2949120K) [PSPermGen: 288388K->288388K(524288K)], 3.8112060 secs] [Times: user=6.94 sys=0.00, real=3.81 secs]
[Full GC [PSYoungGen: 1179648K->1113863K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2686725K(2949120K) [PSPermGen: 288390K->288390K(524288K)], 5.0497080 secs] [Times: user=9.18 sys=0.01, real=5.05 secs]
[Full GC [PSYoungGen: 1179648K->1116476K(1376256K)] [ParOldGen: 1572862K->1572860K(1572864K)] 2752510K->2689336K(2949120K) [PSPermGen: 288394K->288394K(524288K)], 4.9527060 secs] [Times: user=9.02 sys=0.00, real=4.96 secs]
[Full GC [PSYoungGen: 1179648K->1122613K(1376256K)] [ParOldGen: 1572860K->1572863K(1572864K)] 2752508K->2695476K(2949120K) [PSPermGen: 288397K->288397K(524288K)], 6.0263070 secs] [Times: user=11.12 sys=0.03, real=6.02 secs]
[Full GC [PSYoungGen: 1179648K->1128003K(1376256K)] [ParOldGen: 1572863K->1572860K(1572864K)] 2752511K->2700864K(2949120K) [PSPermGen: 288402K->288402K(524288K)], 5.1880620 secs] [Times: user=9.47 sys=0.01, real=5.19 secs]
[Full GC [PSYoungGen: 1179648K->1135408K(1376256K)] [ParOldGen: 1572860K->1572862K(1572864K)] 2752508K->2708271K(2949120K) [PSPermGen: 288409K->288409K(524288K)], 6.0046860 secs] [Times: user=11.07 sys=0.02, real=6.01 secs]
[Full GC [PSYoungGen: 1179648K->1132147K(1376256K)] [ParOldGen: 1572862K->1572863K(1572864K)] 2752510K->2705011K(2949120K) [PSPermGen: 288442K->287380K(524288K)], 4.9795960 secs] [Times: user=8.94 sys=0.01, real=4.98 secs]
[Full GC [PSYoungGen: 1179648K->1139625K(1376256K)] [ParOldGen: 1572863K->1572861K(1572864K)] 2752511K->2712486K(2949120K) [PSPermGen: 287385K->287385K(524288K)], 5.1747490 secs] [Times: user=9.46 sys=0.00, real=5.18 secs]
[Full GC [PSYoungGen: 1179648K->1143909K(1376256K)] [ParOldGen: 1572861K->1572863K(1572864K)] 2752509K->2716772K(2949120K) [PSPermGen: 287390K->287197K(524288K)], 4.7987940 secs] [Times: user=8.64 sys=0.00, real=4.80 secs]
[Full GC [PSYoungGen: 1179648K->1145537K(1376256K)] [ParOldGen: 1572863K->1572861K(1572864K)] 2752511K->2718399K(2949120K) [PSPermGen: 287202K->286872K(524288K)], 4.8555110 secs] [Times: user=8.72 sys=0.01, real=4.85 secs]
<Sep 19, 2012 5:58:41 PM KST> <Info> <Health> <BEA-310002> <7% of the total memory in the server is free>
[Full GC [PSYoungGen: 1179648K->1151337K(1376256K)] [ParOldGen: 1572861K->1572859K(1572864K)] 2752509K->2724197K(2949120K) [PSPermGen: 286877K->286877K(524288K)], 4.5429020 secs] [Times: user=8.21 sys=0.00, real=4.55 secs]
[Full GC [PSYoungGen: 1179648K->1155179K(1376256K)] [ParOldGen: 1572859K->1572862K(1572864K)] 2752507K->2728041K(2949120K) [PSPermGen: 286880K->286880K(524288K)], 6.0272220 secs] [Times: user=11.14 sys=0.02, real=6.03 secs]
[Full GC [PSYoungGen: 1179648K->1157267K(1376256K)] [ParOldGen: 1572862K->1572863K(1572864K)] 2752510K->2730131K(2949120K) [PSPermGen: 286883K->286737K(524288K)], 4.8481250 secs] [Times: user=8.74 sys=0.01, real=4.85 secs]
[Full GC [PSYoungGen: 1179648K->1156741K(1376256K)] [ParOldGen: 1572863K->1572860K(1572864K)] 2752511K->2729601K(2949120K) [PSPermGen: 286741K->286065K(524288K)], 4.9671440 secs] [Times: user=8.93 sys=0.00, real=4.96 secs]
[Full GC [PSYoungGen: 1179648K->1159097K(1376256K)] [ParOldGen: 1572860K->1572861K(1572864K)] 2752508K->2731959K(2949120K) [PSPermGen: 286068K->286067K(524288K)], 4.6047620 secs] [Times: user=8.31 sys=0.00, real=4.60 secs]
[Full GC [PSYoungGen: 1179648K->1162744K(1376256K)] [ParOldGen: 1572861K->1572860K(1572864K)] 2752509K->2735605K(2949120K) [PSPermGen: 286070K->286070K(524288K)], 5.0908920 secs] [Times: user=9.29 sys=0.01, real=5.09 secs]
[Full GC [PSYoungGen: 1179648K->1162382K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->2735243K(2949120K) [PSPermGen: 286072K->285527K(524288K)], 4.8474850 secs] [Times: user=8.69 sys=0.00, real=4.84 secs]
[Full GC [PSYoungGen: 1179648K->1166529K(1376256K)] [ParOldGen: 1572860K->1572863K(1572864K)] 2752508K->2739393K(2949120K) [PSPermGen: 285530K->285530K(524288K)], 5.2516800 secs] [Times: user=9.60 sys=0.01, real=5.26 secs]
[Full GC [PSYoungGen: 1179648K->1167216K(1376256K)] [ParOldGen: 1572863K->1572860K(1572864K)] 2752511K->2740076K(2949120K) [PSPermGen: 285534K->285534K(524288K)], 4.7367610 secs] [Times: user=8.59 sys=0.01, real=4.74 secs]
[Full GC [PSYoungGen: 1179648K->1169989K(1376256K)] [ParOldGen: 1572860K->1572863K(1572864K)] 2752508K->2742853K(2949120K) [PSPermGen: 285535K->285535K(524288K)], 5.8923210 secs] [Times: user=10.88 sys=0.01, real=5.89 secs]
[Full GC [PSYoungGen: 1179648K->1171494K(1376256K)] [ParOldGen: 1572863K->1572863K(1572864K)] 2752511K->2744357K(2949120K) [PSPermGen: 285536K->285536K(524288K)], 5.0178090 secs] [Times: user=9.14 sys=0.01, real=5.02 secs]
[Full GC [PSYoungGen: 1179648K->1172380K(1376256K)] [ParOldGen: 1572863K->1572862K(1572864K)] 2752511K->2745243K(2949120K) [PSPermGen: 285538K->285538K(524288K)], 5.0134600 secs] [Times: user=9.13 sys=0.01, real=5.01 secs]
[Full GC [PSYoungGen: 1179648K->1172420K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2745282K(2949120K) [PSPermGen: 285539K->285539K(524288K)], 5.0530950 secs] [Times: user=9.21 sys=0.01, real=5.05 secs]
[Full GC [PSYoungGen: 1179648K->1175400K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2748262K(2949120K) [PSPermGen: 285539K->285539K(524288K)], 3.9269500 secs] [Times: user=7.14 sys=0.01, real=3.93 secs]
[Full GC [PSYoungGen: 1179648K->1174416K(1376256K)] [ParOldGen: 1572862K->1572861K(1572864K)] 2752510K->2747278K(2949120K) [PSPermGen: 285540K->285540K(524288K)], 5.0551790 secs] [Times: user=9.23 sys=0.00, real=5.06 secs]
[Full GC [PSYoungGen: 1179648K->1176648K(1376256K)] [ParOldGen: 1572861K->1572861K(1572864K)] 2752509K->2749509K(2949120K) [PSPermGen: 285541K->285541K(524288K)], 3.9490610 secs] [Times: user=7.11 sys=0.00, real=3.95 secs]
[Full GC [PSYoungGen: 1179648K->1175110K(1376256K)] [ParOldGen: 1572861K->1572860K(1572864K)] 2752509K->2747971K(2949120K) [PSPermGen: 285542K->285542K(524288K)], 4.9485220 secs] [Times: user=9.02 sys=0.01, real=4.95 secs]
[Full GC [PSYoungGen: 1179648K->1176697K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->2749558K(2949120K) [PSPermGen: 285542K->285542K(524288K)], 3.9058850 secs] [Times: user=7.11 sys=0.00, real=3.91 secs]
[Full GC [PSYoungGen: 1179648K->1177631K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->2750492K(2949120K) [PSPermGen: 285542K->285542K(524288K)], 4.4387430 secs] [Times: user=8.00 sys=0.00, real=4.44 secs]
[Full GC [PSYoungGen: 1179648K->1178374K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->2751234K(2949120K) [PSPermGen: 285543K->285543K(524288K)], 4.2610870 secs] [Times: user=7.78 sys=0.00, real=4.26 secs]
[Full GC [PSYoungGen: 1179648K->1178513K(1376256K)] [ParOldGen: 1572860K->1572862K(1572864K)] 2752508K->2751376K(2949120K) [PSPermGen: 285543K->285543K(524288K)], 4.4184400 secs] [Times: user=7.98 sys=0.01, real=4.42 secs]
[Full GC [PSYoungGen: 1179648K->1178982K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2751845K(2949120K) [PSPermGen: 285543K->285543K(524288K)], 3.9139180 secs] [Times: user=7.10 sys=0.00, real=3.92 secs]
[Full GC [PSYoungGen: 1179648K->1179064K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2751927K(2949120K) [PSPermGen: 285543K->285543K(524288K)], 3.8690320 secs] [Times: user=7.05 sys=0.01, real=3.87 secs]
[Full GC [PSYoungGen: 1179648K->1178923K(1376256K)] [ParOldGen: 1572862K->1572859K(1572864K)] 2752510K->2751783K(2949120K) [PSPermGen: 285546K->285546K(524288K)], 4.3433860 secs] [Times: user=7.88 sys=0.00, real=4.34 secs]
[Full GC [PSYoungGen: 1179648K->1176766K(1376256K)] [ParOldGen: 1572859K->1572862K(1572864K)] 2752507K->2749629K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 6.0282350 secs] [Times: user=11.15 sys=0.01, real=6.03 secs]
[Full GC [PSYoungGen: 1179648K->1176783K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2749646K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 4.9490590 secs] [Times: user=9.00 sys=0.01, real=4.95 secs]
[Full GC [PSYoungGen: 1179648K->1176673K(1376256K)] [ParOldGen: 1572862K->1572863K(1572864K)] 2752510K->2749536K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 4.3054900 secs] [Times: user=7.81 sys=0.01, real=4.31 secs]
[Full GC [PSYoungGen: 1179648K->1176677K(1376256K)] [ParOldGen: 1572863K->1572863K(1572864K)] 2752511K->2749541K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 3.8990620 secs] [Times: user=7.11 sys=0.00, real=3.90 secs]
[Full GC [PSYoungGen: 1179648K->1176679K(1376256K)] [ParOldGen: 1572863K->1572863K(1572864K)] 2752511K->2749542K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 3.8563960 secs] [Times: user=7.02 sys=0.00, real=3.86 secs]
[Full GC [PSYoungGen: 1179648K->1176541K(1376256K)] [ParOldGen: 1572863K->1572863K(1572864K)] 2752511K->2749404K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 4.2682630 secs] [Times: user=7.75 sys=0.00, real=4.27 secs]
[Full GC [PSYoungGen: 1179648K->1176546K(1376256K)] [ParOldGen: 1572863K->1572863K(1572864K)] 2752511K->2749409K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 3.9169630 secs] [Times: user=7.13 sys=0.00, real=3.92 secs]
[Full GC [PSYoungGen: 1179648K->1176558K(1376256K)] [ParOldGen: 1572863K->1572862K(1572864K)] 2752511K->2749421K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 3.9354520 secs] [Times: user=7.13 sys=0.01, real=3.93 secs]
[Full GC [PSYoungGen: 1179648K->1176396K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2749258K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 4.1816800 secs] [Times: user=7.57 sys=0.00, real=4.18 secs]
[Full GC [PSYoungGen: 1179648K->1176403K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2749266K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 3.8610250 secs] [Times: user=7.00 sys=0.00, real=3.86 secs]
[Full GC [PSYoungGen: 1179648K->1176405K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2749268K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 3.9329700 secs] [Times: user=7.03 sys=0.00, real=3.93 secs]
[Full GC [PSYoungGen: 1179648K->1176296K(1376256K)] [ParOldGen: 1572862K->1572860K(1572864K)] 2752510K->2749157K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 4.2194090 secs] [Times: user=7.45 sys=0.01, real=4.22 secs]
[Full GC [PSYoungGen: 1179648K->1176301K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->2749162K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 3.8973000 secs] [Times: user=7.05 sys=0.00, real=3.89 secs]
[Full GC [PSYoungGen: 1179648K->1176300K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->2749161K(2949120K) [PSPermGen: 285565K->285565K(524288K)], 3.8683520 secs] [Times: user=7.03 sys=0.00, real=3.87 secs]
[Full GC [PSYoungGen: 1179648K->1176301K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->2749162K(2949120K) [PSPermGen: 285566K->285565K(524288K)], 4.6701620 secs] [Times: user=8.47 sys=0.00, real=4.67 secs]
<Sep 19, 2012 6:01:41 PM KST> <Info> <WorkManager> <BEA-002936> <maximum thread constraint ClusterMessaging is reached>
[Full GC [PSYoungGen: 1179648K->1176357K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->2749217K(2949120K) [PSPermGen: 285570K->285570K(524288K)], 3.9433620 secs] [Times: user=7.14 sys=0.01, real=3.94 secs]
[Full GC [PSYoungGen: 1179648K->1176230K(1376256K)] [ParOldGen: 1572860K->1572863K(1572864K)] 2752508K->2749094K(2949120K) [PSPermGen: 285572K->285572K(524288K)], 5.5530950 secs] [Times: user=10.14 sys=0.02, real=5.55 secs]
[Full GC [PSYoungGen: 1179648K->1176231K(1376256K)] [ParOldGen: 1572863K->1572863K(1572864K)] 2752511K->2749095K(2949120K) [PSPermGen: 285572K->285572K(524288K)], 3.8853460 secs] [Times: user=7.03 sys=0.00, real=3.88 secs]
[Full GC [PSYoungGen: 1179648K->1176461K(1376256K)] [ParOldGen: 1572863K->1572863K(1572864K)] 2752511K->2749324K(2949120K) [PSPermGen: 285572K->285572K(524288K)], 4.6974050 secs] [Times: user=8.52 sys=0.00, real=4.70 secs]
[Full GC [PSYoungGen: 1179648K->1176329K(1376256K)] [ParOldGen: 1572863K->1572863K(1572864K)] 2752511K->2749193K(2949120K) [PSPermGen: 285579K->285579K(524288K)], 3.9842760 secs] [Times: user=7.29 sys=0.00, real=3.98 secs]
[Full GC [PSYoungGen: 1179648K->1175875K(1376256K)] [ParOldGen: 1572863K->1572862K(1572864K)] 2752511K->2748737K(2949120K) [PSPermGen: 285582K->285582K(524288K)], 4.0799430 secs] [Times: user=7.43 sys=0.01, real=4.08 secs]
[Full GC [PSYoungGen: 1179648K->1175878K(1376256K)] [ParOldGen: 1572862K->1572860K(1572864K)] 2752510K->2748738K(2949120K) [PSPermGen: 285583K->285583K(524288K)], 5.0815000 secs] [Times: user=8.68 sys=0.01, real=5.08 secs]
[Full GC [PSYoungGen: 1179648K->1175778K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->2748638K(2949120K) [PSPermGen: 285583K->285583K(524288K)], 4.0461900 secs] [Times: user=7.36 sys=0.00, real=4.05 secs]
[Full GC [PSYoungGen: 1179648K->1175783K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->2748644K(2949120K) [PSPermGen: 285583K->285583K(524288K)], 3.8743530 secs] [Times: user=7.05 sys=0.00, real=3.88 secs]
[Full GC [PSYoungGen: 1179648K->1175787K(1376256K)] [ParOldGen: 1572860K->1572860K(1572864K)] 2752508K->2748648K(2949120K) [PSPermGen: 285583K->285583K(524288K)], 3.8761550 secs] [Times: user=7.07 sys=0.01, real=3.87 secs]
[Full GC [PSYoungGen: 1179648K->1175746K(1376256K)] [ParOldGen: 1572860K->1572862K(1572864K)] 2752508K->2748609K(2949120K) [PSPermGen: 285583K->285583K(524288K)], 6.0090260 secs] [Times: user=10.89 sys=0.02, real=6.01 secs]
[Full GC [PSYoungGen: 1179648K->1175746K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2748609K(2949120K) [PSPermGen: 285583K->285583K(524288K)], 3.8923020 secs] [Times: user=7.10 sys=0.00, real=3.89 secs]
[Full GC [PSYoungGen: 1179648K->1176038K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2748901K(2949120K) [PSPermGen: 285639K->285634K(524288K)], 4.9666340 secs] [Times: user=8.77 sys=0.00, real=4.96 secs]
[Full GC [PSYoungGen: 1179648K->1176145K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2749008K(2949120K) [PSPermGen: 285634K->285634K(524288K)], 5.0055170 secs] [Times: user=9.13 sys=0.01, real=5.00 secs]
[Full GC [PSYoungGen: 1179648K->1176334K(1376256K)] [ParOldGen: 1572862K->1572861K(1572864K)] 2752510K->2749196K(2949120K) [PSPermGen: 285647K->285646K(524288K)], 4.9648590 secs] [Times: user=8.85 sys=0.01, real=4.97 secs]
[Full GC [PSYoungGen: 1179648K->1176347K(1376256K)] [ParOldGen: 1572861K->1572861K(1572864K)] 2752509K->2749208K(2949120K) [PSPermGen: 285646K->285646K(524288K)], 3.9303300 secs] [Times: user=7.14 sys=0.00, real=3.93 secs]
[Full GC [PSYoungGen: 1176359K->1176289K(1376256K)] [ParOldGen: 1572861K->1572861K(1572864K)] 2749221K->2749150K(2949120K) [PSPermGen: 285646K->285646K(524288K)], 3.9355050 secs] [Times: user=7.19 sys=0.00, real=3.94 secs]
[Full GC [PSYoungGen: 1179648K->1176389K(1376256K)] [ParOldGen: 1572861K->1572860K(1572864K)] 2752509K->2749250K(2949120K) [PSPermGen: 285650K->285650K(524288K)], 4.9109410 secs] [Times: user=8.88 sys=0.00, real=4.91 secs]
[Full GC [PSYoungGen: 1179648K->1176148K(1376256K)] [ParOldGen: 1572860K->1572862K(1572864K)] 2752508K->2749010K(2949120K) [PSPermGen: 285650K->285647K(524288K)], 5.8845800 secs] [Times: user=10.88 sys=0.02, real=5.89 secs]
[Full GC [PSYoungGen: 1179648K->1176148K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2749010K(2949120K) [PSPermGen: 285647K->285647K(524288K)], 3.8494270 secs] [Times: user=7.02 sys=0.00, real=3.85 secs]
[Full GC [PSYoungGen: 1179648K->1176129K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2748991K(2949120K) [PSPermGen: 285647K->285647K(524288K)], 3.9007170 secs] [Times: user=7.11 sys=0.00, real=3.90 secs]
[Full GC [PSYoungGen: 1179648K->1176424K(1376256K)] [ParOldGen: 1572862K->1572862K(1572864K)] 2752510K->2749286K(2949120K) [PSPermGen: 285647K->285647K(524288K)], 3.8894110 secs] [Times: user=7.08 sys=0.01, real=3.89 secs]
<Sep 19, 2012 6:03:59 PM KST> <Info> <WorkManager> <BEA-002936> <maximum thread constraint ClusterMessaging is reached>
[Full GC [PSYoungGen: 1179648K->1176583K(1376256K)] [ParOldGen: 1572862K->1572861K(1572864K)] 2752510K->2749444K(2949120K) [PSPermGen: 285746K->285746K(524288K)], 4.5299170 secs] [Times: user=8.18 sys=0.00, real=4.53 secs]
[Full GC [PSYoungGen: 1179648K->1176516K(1376256K)] [ParOldGen: 1572861K->1572860K(1572864K)] 2752509K->2749377K(2949120K) [PSPermGen: 285753K->285753K(524288K)], 5.1704630 secs] [Times: user=9.41 sys=0.01, real=5.17 secs]
[Full GC [PSYoungGen: 1179648K->1176480K(1376256K)] [ParOldGen: 1572860K->1572859K(1572864K)] 2752508K->2749340K(2949120K) [PSPermGen: 285757K->285757K(524288K)], 5.1222890 secs] [Times: user=9.35 sys=0.00, real=5.12 secs]


Can someone provide pointers on what could be causing Full GC to run at such frequent intervals and how can it be traced / resolved ?

Any pointers are highly appreciated since this is a production ready instance .

Thanks
Srinath

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