heap size in apache tomcat 5.x

[Kartik Ruppa]

Hi,
I wish to set heap size in tomcat server 5.x.Where should I set it and how?
Thanks in advance!
Kartik

[Uwe Kubosch]

Originally posted by Kartik Ruppa:
Hi,
I wish to set heap size in tomcat server 5.x.Where should I set it and how?
Thanks in advance!
Kartik

Did you get any answer to this? i'm trying to do the same thing now.
I found that I cat set the JAVA_OPTS environment variable, but I am not sure which JVMs are affected by this.
Im using the Sun JVM, and I guess the default heap size is 64MB. My app is now using 57MB, so I'm fairly close to the limit.
Do all the webapps in Tomcat share the same heap?

donV

[William Brogden]

This really belongs in the Tomcat forum, but anyway. Yes - all servlets in a given Tomcat instance are running in the same memory space. It looks to me like JAVA_OPTS is the options command line to the JVM that executes Tomcat when starting as an application. I don't know how you set the memory opts when starting as a service.
Bill

[Mohammad Musleh]

You can increase heap size for tomcat by setting an environment variable for that
1.right click on My Computer icon
2.click properties option
3.click advanced tab
4.click Environment Variables button
5.click New button under System Variables
6.type JAVA_OPTS in the Variable Name box
7.type -Xms512m -Xmx128m in the variable value box
8.click Ok and then Ok and then Ok
enjoy �

[Ilja Preuss]

Moving to Tomcat forum...

[Roel De Nijs]

Originally posted by William Brogden:
This really belongs in the Tomcat forum, but anyway. Yes - all servlets in a given Tomcat instance are running in the same memory space. It looks to me like JAVA_OPTS is the options command line to the JVM that executes Tomcat when starting as an application. I don't know how you set the memory opts when starting as a service.
Bill

if you run it as service, you can make the changes in the service.bat file. e.g.

rem Set extra parameters
"%EXECUTABLE%" //US//%SERVICE_NAME% --JvmOptions "-Xms128M;-Xmx512M;-Dcatalina.base=%CATALINA_BASE%;-Dcatalina.home=%CATALINA_HOME%;-Djava.endorsed.dirs=%CATALINA_HOME%\common\endorsed" --StartMode jvm --StopMode jvm
rem More extra parameters
set PR_STDOUTPUT=%CATALINA_HOME%\logs\stdout.log
set PR_STDERROR=%CATALINA_HOME%\logs\stderr.log
"%EXECUTABLE%" //US//%SERVICE_NAME% ++JvmOptions "-Djava.io.tmpdir=%CATALINA_BASE%\temp" --JvmMs 128 --JvmMx 512