issue with limiting java's memory usage
Patrick Lamaiziere
patfbsd at davenulle.org
Sun Jan 29 21:11:05 UTC 2012
Le Sun, 29 Jan 2012 19:34:11 +0000,
Alexander Best <arundel at freebsd.org> a écrit :
> hi there,
Hello,
> maybe i'm missing something obvious, but i don't quite understand the
> following top(1) output:
>
> last pid: 13875; load averages: 0.73, 0.75, 0.68
> 65 processes: 2 running, 62 sleeping, 1 waiting
> CPU 0: 19.5% user, 0.0% nice, 13.3% system, 0.0% interrupt, 67.2%
> idle CPU 1: 20.3% user, 0.0% nice, 7.8% system, 0.0% interrupt,
> 71.9% idle Mem: 1365M Active, 185M Inact, 323M Wired, 69M Cache, 213M
> Buf, 32M Free Swap: 10G Total, 2494M Used, 7746M Free, 24% Inuse, 4K
> In
>
> PID UID THR PRI NICE SIZE RES STATE C TIME WCPU
> COMMAND 6913 1001 32 20 0 4252M 1312M uwait 0 18.3H
> 39.06% /usr/local/diablo-jdk1.6.0/bin/java -Xmx512m -jar JDownloade
>
> ...how can the size of the resident memory of pid 6913 be > 512
> megabytes?
I don't know but you can inspect the java application with the java
console (jconsole). There are several stats on memory usage.
With JDownloader (doing nothing), I see 57 MB of "non heap memory
usage", and "only" 30 MB of heap memory.
Regards.
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