Hi John,
Thanks for response. please see answers inline.
Have you run the server with a profiler attached (such as jprobe, yourkit,
etc.)?
{Prashant>>} No, we have not used any profiler tool yet.
Are you load testing at a steady state? I.e., are you just running
the same request over and over in a loop? Or something more complicated?
{Prashant>>} Yes we are iterating over a simple Get request only using Jmeter.
Are you on a single-core CPU for the test or one core for the load
tester and one core for the server or what? I.e., what's your test
setup?
{Prashant>>} the test env is very high end machine. that is not a problem.
What's your server setup? What version of the which JVM are you
using, what flags, etc.?
{Prashant>>} Server is tomcat 6, JVM version is 1.5.0_15 and flags are as given
below:
JAVA_OPTS="-XX:PermSize=128M -Xms1024M -Xmx1024M -verbose:gc"
JAVA_OPTS="$JAVA_OPTS "-XX:+UseParallelGC
Anyway, the short answer is very likely a GC issue. Whether or not
there's much for you to do about will depend on all of the specifics.
Use a profiler and find out.
Full GC is not running very frequently as only 4-5 times in test of approx 4+
hrs
Rest GC logs are as given below:
[GC 229449K->26581K(920128K), 0.1256557 secs]
[GC 227733K->24585K(910848K), 0.1229751 secs]
[GC 223497K->26901K(911104K), 0.1219179 secs]
[GC 223637K->27180K(912896K), 0.1182056 secs]
[GC 221804K->24372K(906432K), 0.1202989 secs]
[GC 216884K->26299K(903104K), 0.1210345 secs]
[GC 216763K->27832K(906048K), 0.1120220 secs]
[GC 216312K->28156K(900480K), 0.1164525 secs]
[GC 214652K->28312K(901504K), 0.1143799 secs]
[GC 212888K->25634K(893632K), 0.1180457 secs]
[GC 208290K->26513K(897984K), 0.1151762 secs]
[GC 207313K->27598K(891264K), 0.1144405 secs]
[GC 206606K->28563K(893952K), 0.1090829 secs]
[GC 205779K->29436K(889216K), 0.1105980 secs]
[GC 204924K->29700K(889088K), 0.1341427 secs]
[GC 203460K->30048K(885824K), 0.1077271 secs]
Please help. Thanks
Prashant
