Hi,
I have been trying to tune GC on WLP 8.1.6 and here arr my settings.
MEM_ARGS="-Xms2048m -Xmx2048m -XX
ermSize=128m -XX:MaxPermSize=512m -XX:NewRatio=3 -XX:-UseParallelGC -verbose:gc -Xverify:none"
My major collection times are too long and here is a snippet from the log..
[GC 1420462K->950403K(2081792K), 0.4194167 secs]
[GC 1443971K->968294K(2081792K), 0.3781520 secs]
[GC 1461862K->986951K(2081792K), 0.3401775 secs]
[GC 1480519K->1003273K(2081792K), 0.3461539 secs]
[GC 1496841K->1022060K(2081792K), 0.4221607 secs]
[GC 1515628K->1047164K(2081792K), 0.4825944 secs]
[GC 1540732K->1064888K(2081792K), 0.4082768 secs]
[GC 1558456K->1079497K(2081792K), 0.3533515 secs]
[Full GC[Unloading class sun.reflect.GeneratedMethodAccessor1951]
1573065K->739842K(2081792K), 11.2938250 secs]
[GC 1233410K->784557K(2081792K), 0.6538970 secs]
[GC 1278125K->797515K(2081792K), 0.3887030 secs]
[GC 1291083K->804385K(2081792K), 0.2686290 secs]
[GC 1297953K->811593K(2081792K), 0.2373969 secs]
[GC 1305161K->828135K(2081792K), 0.3038601 secs]
[GC 1321703K->837189K(2081792K), 0.2940410 secs]
[GC 1330757K->857660K(2081792K), 0.3334175 secs]
[GC 1351228K->878371K(2081792K), 0.3781239 secs]
[GC 1371939K->899573K(2081792K), 0.3377001 secs]
[GC 1393141K->925276K(2081792K), 0.5319204 secs]
[GC 1418844K->950563K(2081792K), 0.4501572 secs]
[GC 1444131K->964364K(2081792K), 0.3361071 secs]
[GC 1457932K->975792K(2081792K), 0.2483201 secs]
[GC 1469360K->989934K(2081792K), 0.2808589 secs]
[GC 1483502K->1003977K(2081792K), 0.3009416 secs]
[GC 1497545K->1012658K(2081792K), 0.2405290 secs]
[GC 1506226K->1029767K(2081792K), 0.3398602 secs]
[GC 1523335K->1048771K(2081792K), 0.3506587 secs]
[GC 1542339K->1063714K(2081792K), 0.3412825 secs]
[GC 1557282K->1079638K(2081792K), 0.4134464 secs]
[Full GC[Unloading class jsp_servlet._jsp._lfs._content.__lfsmailtowest]
1573206K->764763K(2081792K), 10.5904149 secs]
[GC 1257095K->808614K(2081792K), 0.6313730 secs]
[GC 1302182K->820312K(2081792K), 0.3818220 secs]
[GC 1313880K->839642K(2081792K), 0.3586249 secs]
[GC 1333210K->858920K(2081792K), 0.4036932 secs]
[GC 1352488K->875219K(2081792K), 0.3438735 secs]
[GC 1368787K->892350K(2081792K), 0.3877395 secs]
[GC 1385918K->907809K(2081792K), 0.3372883 secs]
[GC 1401377K->928541K(2081792K), 0.4187334 secs]
[GC 1422089K->951917K(2081792K), 0.4489247 secs]
[GC 1445485K->965484K(2081792K), 0.3188618 secs]
[GC 1459052K->975390K(2081792K), 0.2776420 secs]
[GC 1468958K->997034K(2081792K), 0.3518497 secs]
[GC 1490602K->1025043K(2081792K), 0.4275449 secs]
[GC 1518611K->1046393K(2081792K), 0.4697244 secs]
[GC 1539961K->1066377K(2081792K), 0.3888271 secs]
[GC 1559945K->1088796K(2081792K), 0.4222889 secs]
[Full GC[Unloading class sun.reflect.GeneratedMethodAccessor1958]
1582364K->777698K(2081792K), 11.0686289 secs]
[GC 1271266K->819907K(2081792K), 0.5621499 secs]
[GC 1313475K->832715K(2081792K), 0.3017444 secs]
[GC 1326283K->850442K(2081792K), 0.3368461 secs]
[GC 1344010K->862379K(2081792K), 0.3236737 secs]
[GC 1355947K->873458K(2081792K), 0.2952772 secs]
[GC 1367026K->885945K(2081792K), 0.2852358 secs]
[GC 1379513K->904909K(2081792K), 0.3441992 secs]
[GC 1398477K->916848K(2081792K), 0.3153624 secs]
[GC 1410416K->927685K(2081792K), 0.2440841 secs]
[GC 1421253K->942981K(2081792K), 0.2949466 secs]
How do I improve the major collection pause times? I have tried the -Xincgc option but with little success. Should I reduce the size of the heap?
Thanks in advance..
Chang