Date: Wed, 05 Jul 2006 23:28:04 +0200 From: Martijn Veening <martijn@detrics.com> To: Kurt Miller <kurt@intricatesoftware.com>, freebsd-java@freebsd.org Subject: Re: Apache Tomcat crash on 6.1 Message-ID: <1152134883.7788.12.camel@detri015.speed.planet.nl> In-Reply-To: <200607051503.35873.kurt@intricatesoftware.com> References: <1152082235.30307.19.camel@detri015.speed.planet.nl> <200607051337.16442.lists@intricatesoftware.com> <1152122995.5382.14.camel@detri015.speed.planet.nl> <200607051503.35873.kurt@intricatesoftware.com>
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Hi Kurt, thnx for suggestions, Indeed it seems that java process memory increases, although the reading is different from the tomcat manager reading. The size started at 450M (res 100M) and after 6 hours increased to 600M (res 160M). I can imagine that if that continues another 10 hours, the 1 Gb limit is reached causing crash. Tomcat however read lower memory-usage, but that will be memory within the JVM-reserved memory, which differs from the process-memory in FreeBSD (I presume). Could it be a memory leak ? Or is this increase normal because it contains cached memory which can be freed when nescessary ? And where could I see the diagnostic message for the malloc() function ? Martijn Veening www.detrics.com On Wed, 2006-07-05 at 21:03, Kurt Miller wrote: > Hi Martijn, > > On Wednesday 05 July 2006 2:09 pm, Martijn Veening wrote: > > Thanks Kurt, but an out-of-memory error seems unlikely, it's a > > SuperMicro server with 1 Gb of memory and 256 Mb dedicated to the JVM > > (by JVM startup-options in catalina.sh). > > Some ideas: > 1) check your datasize ulimit for the login class of the user > tomcat is running under. > 2) set the X malloc() option (ln -s X /etc/malloc.conf) and > see if you get a diagnostic message as to why malloc() is > returning NULL. > 3) watch the java process memory utilization over time with > top or ps -l and look for increasing memory usage. > > > I added the JVM-parameter -XX:+UseMembar now, but i understand that the > > diablo-1.5.0_7 has this turned on by default, so that probably doesn't > > help > > Correct > > > (the server hasn't crashed since though, but is only up for 10 > > hours, so not conclusive). > > > > It is a 2-processor machine though: does that require tuning ? > > Nothing in particular comes to mind, but you could look through > some of Sun's docs at http://java.sun.com/docs/hotspot/index.html > > Regards, > -Kurt > _______________________________________________ > freebsd-java@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-java > To unsubscribe, send any mail to "freebsd-java-unsubscribe@freebsd.org" >
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