First observations. YGC (Young gen count) is 6893 and FGCT is 6882 which is a completely ridiculous full GC to GC ratio. As for the times, YGCT is 17.56 where as FGCT is 2705.923 giving a 99.9% Full GC to GC ratio. A normal FGC:GC ratio should be less than 5% and less than 1% is desirable.
Second observation PC is perm gen configured @ 83968 and PU perm gen used at 83967.9 Diagnosis: Frequent Full GC's due to Perm Gen being full. Solution: Increase the size of perm gen using -XX:MaxPermSize. Regards, Kirk On Feb 15, 2011, at 8:17 PM, agile.j...@gmail.com wrote: > hi: > > I found a java process whose cpu is almost 100% at my notebook. > > Here is the top output: > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ > > 6150 root 20 0 1411m 612m 12m R 98.8 15.7 45:49.12 > > and the jstack output for thread 6150(0x1806): > "VM Thread" prio=10 tid=0x0000000040ca9000 nid=0x1806 runnable > > the last is jstat -gc output: > > S0C S1C S0U S1U EC EU OC OU PC > PU YGC YGCT FGC FGCT GCT > 64.0 64.0 0.0 0.0 332992.0 0.0 666304.0 73192.5 83968.0 > 83967.9 6893 17.576 6882 2705.923 2723.499 > > I don't know what the "VM Thread" is doing all the time. > > Some peopel encounter the same problem? > > Here is my enviromen: > Jvm: > java version "1.6.0_23" > Java(TM) SE Runtime Environment (build 1.6.0_23-b05) > Java HotSpot(TM) 64-Bit Server VM (build 19.0-b09, mixed mode) > > OS: > Linux 2.6.35-26-generic #46-Ubuntu SMP Sun Jan 30 06:59:07 UTC 2011 x86_64 > GNU/Linux > > Thanks. > > > > -- > d0ngd0ng > > -- > You received this message because you are subscribed to the Google Groups > "The Java Posse" group. > To post to this group, send email to javaposse@googlegroups.com. > To unsubscribe from this group, send email to > javaposse+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/javaposse?hl=en. -- You received this message because you are subscribed to the Google Groups "The Java Posse" group. To post to this group, send email to javaposse@googlegroups.com. To unsubscribe from this group, send email to javaposse+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/javaposse?hl=en.
