Nathan Smith <[EMAIL PROTECTED]> wrote: > > The problem can be fixed by increasing your -XX:MaxPermSize value to > more than 256.
I've increased it to 512m now. I'll see. > Download and use a program called visualgc available here > http://java.sun.com/performance/jvmstat. You can have it running > during the day and monitor what the garbage collector is doing and > how the > Eden, Old and Perm Gen heap spaces are growing. If Tomcat is not > throwing an OOM error then the Garbage Collector could be trying to do > Full GC's causing Tomcat to hang and become unresponsive. There is a > flow on affect here, which makes it look as though the problem is > caused by something else. Looks like no way I can run it on headless box. Setting the deamon up fails because it can't write somewhere. # /usr/lib/java5/bin/jstatd Could not create remote object access denied (java.util.PropertyPermission java.rmi.server.ignoreSubClasses write) java.security.AccessControlException: access denied (java.util.PropertyPermission java.rmi.server.ignoreSubClasses write) at java.security.AccessControlContext.checkPermission(AccessControlContext. java:264) at java.security.AccessController.checkPermission(AccessController.java:427 ) at java.lang.SecurityManager.checkPermission(SecurityManager.java:532) at java.lang.System.setProperty(System.java:698) at sun.tools.jstatd.Jstatd.main(Jstatd.java:122) Thanks to Java I still don't know where.. :> Anyway: a) I've added -Xloggc:/home/tomcat/logs/gc.log I logs sth such inputs: 1489.487: [GC 219875K->151505K(1018496K), 0.0292590 secs] 1546.088: [GC 225745K->152608K(1031744K), 0.0268240 secs] 1591.348: [GC 241696K->152348K(1023296K), 0.0198200 secs] 1635.863: [GC 241052K->156605K(1030656K), 0.0218510 secs] 1653.314: [GC 244925K->155047K(1022272K), 0.0205590 secs] 1727.156: [GC 243047K->157627K(1029632K), 0.0215210 secs] 1730.679: [GC 245307K->163738K(1030016K), 0.0263340 secs] 1740.791: [GC 251098K->165299K(1030016K), 0.0266920 secs] 1750.912: [GC 252275K->162599K(1022592K), 0.0220800 secs] 1790.949: [GC 249255K->163285K(1028672K), 0.0179890 secs] b) These values do not mean ANYTHING to me but percheps they will be readable by someone from the list: # /usr/lib/java5/bin/jstat -gc 28923 S0C S1C S0U S1U EC EU OC OU PC PU YGC YGCT FGC FGCT GCT 9984.0 12352.0 9975.6 0.0 83008.0 21940.2 932096.0 168376.4 48640.0 48550.7 82 2.150 0 0.000 2.150 # /usr/lib/java5/bin/jstat -gcutil 28923 S0 S1 E O P YGC YGCT FGC FGCT GCT 99.92 0.00 58.27 18.06 99.82 82 2.150 0 0.000 2.150 # /usr/lib/java5/bin/jstat -gccapacity 28923 NGCMN NGCMX NGC S0C S1C EC OGCMN OGCMX OGC OC PGCMN PGCMX PGC PC YGC FGC 116480.0 116480.0 106368.0 11840.0 4736.0 82688.0 932096.0 932096.0 932096.0 932096.0 16384.0 524288.0 48640.0 48640.0 83 0 # /usr/lib/java5/bin/jstat -gcpermcapacity 28923 PGCMN PGCMX PGC PC YGC FGC FGCT GCT 16384.0 524288.0 48640.0 48640.0 83 0 0.000 2.172 28923 is the PID of jvm I'm focused on -- T. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
