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From Martin Gainty <mgai...@hotmail.com>
Subject RE: BLACK ZONE alert on Stopping Tomcat Server
Date Mon, 02 Jun 2008 15:41:10 GMT

Is there any way to tune and or configure the individual VPS parameters to respect JVM memory
parameters ?
for example JAVA_OPTS could be
-Xms256m -Xmx512m -XX:MaxPermSize=512m 

(for example the equivalent VMWare configuration settings)
http://kb.vmware.com/selfservice/microsites/search.do?cmd=displayKC&docType=kc&externalId=1004059&sliceId=1&docTypeID=DT_KB_1_1&dialogID=67462400&stateId=0%200%2067460275

Thank You
Martin

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> Date: Mon, 2 Jun 2008 08:05:37 -0700
> From: gabrielw@ngasi.com
> To: users@tomcat.apache.org
> Subject: Re: BLACK ZONE alert on Stopping Tomcat Server
> 
> Hi Ghulam,
> Virtuozzo, is an OS level based VPS. Which means available system 
> resources are shared between the VPS.
> During Shutdown, a Java process is created; this in turn utilizes a 
> burst of RAM. So at that moment you have
> 3 JVMs running - TomcatA, TomcatB, and ShutdownA. That 3rd JVM may be 
> stretching the available resources
> on your System. Now after TomcatA is completely shutdown, when you go to 
> shutdown TomcatB,
> at that particular moment you have 2 JVMS (TomcatB,ShutdownB), which 
> your system is able to easily handle.
> It is essentially a matter of available system RAM. You may want to 
> increase the RAM.
> 
> Ghulam_Hussain wrote:
> > I have configured multiple tomcat servers on a remote linux machine, and
> > monitors linux applications through Virtuozzo.
> >
> > When I shutdown the TomcatA while TomcatB is running, the Virtuozzo shows
> > the Black Zone alert (indicating that linux server is in serious state,
> > related to system memory).
> >
> > Similarly when I shutdown TomcatB while TomcatA is running, the same problem
> > occurs.
> >
> > But when the one Tomcat server is already stopped, and other Tomcat server
> > is shutdown, then no problem occurs.
> >
> > Any clue, that why Black Zone alert occurs.................or the Tomcat
> > servers uses each other resources while being shutdown.
> >
> > Any help will be appreciated....
> >   
> 
> 
> -- 
> Regards
> 
> Gabe Wong
> NGASI AppServer Manager
> JAVA AUTOMATION and SaaS Enablement
> http://www.ngasi.com
> NEW! 8.1 - Centrally manage Application Servers across multiple physical servers
> 
> 
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