Hi Prashant, You should indeed try using a profiler. Otherwise, try to isolate the cause of these spikes, for example replacing the Restlet-LDAP resources with mock resources and see how it affects the behavior.
If this becomes very urgent or too complex to debug and figure out, we can help you through our consulting services: http://www.noelios.com/services/consulting Otherwise, if you think it is an issue inside Restlet code, try to isolate a reproducible sample and attach it to your reply or a new issue in the tracker. We'll look at it ASAP. Best regards, Jerome Louvel -- Restlet ~ Founder and Lead developer ~ http://www.restlet.org Noelios Technologies ~ Co-founder ~ http://www.noelios.com -----Message d'origine----- De : news [mailto:[EMAIL PROTECTED] De la part de Prashant Envoye : mardi 30 septembre 2008 10:09 A : [email protected] Objet : Re: Spiky behavior of restlet in Load test 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
