Re: Heap size for two container sharing single JVM
Thanks Chuck. These two tomcat containers are running under two different user accounts. I was exploring few things and found jps and jinfo commands, which showed two different processes for each container. Now that output makes more sense to me. -- jM. On Mon, May 24, 2010 at 2:03 PM, Caldarale, Charles R < chuck.caldar...@unisys.com> wrote: > > From: Johan Martinez [mailto:jmart...@gmail.com] > > Subject: Heap size for two container sharing single JVM > > > > it will share the same JDK instance. > > All that means is that the same JDK is used as the process templates for > the each JVM instance. > > > Do I need to setup java heap space separately for > > both containers? > > Yes, they are completely independent. Make sure you have enough RAM to > support the process space requirements for everything you're running on the > system. > > > For a single container I am adding heap space (Xmx) > > option to JAVA_OPTS in catalina.sh script. > > You should do that in setenv.sh, not catalina.sh; catalina.sh will call > setenv.sh if it exists. > > > Do I need to add this option to second container again > > or set it somewhere else? > > You need to create or modify the script in the second Tomcat instance. > > > Since it is a JDK option and not tomcat option > > It's actually a running JVM option, not a JDK option. > > > I am thinking it is a system-wide setting and not > > specific to each container. > > You are incorrect. > > - Chuck > > > THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY > MATERIAL and is thus for use only by the intended recipient. If you received > this in error, please contact the sender and delete the e-mail and its > attachments from all computers. > > > - > To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org > For additional commands, e-mail: users-h...@tomcat.apache.org > >
RE: Heap size for two container sharing single JVM
> From: Johan Martinez [mailto:jmart...@gmail.com] > Subject: Heap size for two container sharing single JVM > > it will share the same JDK instance. All that means is that the same JDK is used as the process templates for the each JVM instance. > Do I need to setup java heap space separately for > both containers? Yes, they are completely independent. Make sure you have enough RAM to support the process space requirements for everything you're running on the system. > For a single container I am adding heap space (Xmx) > option to JAVA_OPTS in catalina.sh script. You should do that in setenv.sh, not catalina.sh; catalina.sh will call setenv.sh if it exists. > Do I need to add this option to second container again > or set it somewhere else? You need to create or modify the script in the second Tomcat instance. > Since it is a JDK option and not tomcat option It's actually a running JVM option, not a JDK option. > I am thinking it is a system-wide setting and not > specific to each container. You are incorrect. - Chuck THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. - To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
Heap size for two container sharing single JVM
Hi, I am using Tomcat 5.5.27 core package on CentOS 5.3. I need to add tomcat-6 on the same machine and it will share the same JDK instance. Do I need to setup java heap space separately for both containers? For a single container I am adding heap space (Xmx) option to JAVA_OPTS in catalina.sh script. Do I need to add this option to second container again or set it somewhere else? Since it is a JDK option and not tomcat option, I am thinking it is a system-wide setting and not specific to each container. Am I correct? -- jM.
