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Heap size on tomcat 6

Posted on 2009-04-03
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Last Modified: 2013-12-02
I have Apache Tomcat 6 installed on my PC. If I deploy more than 2 applications in Tomcat, it starts giving me "Heap size: Out of memory" exception.

I have 4 GB RAM and windows XP OS.

Can someone please let me know how to increase the Heap Size.
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Question by:w_serena
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9 Comments
 
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Accepted Solution

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objects earned 150 total points
ID: 24058130
add -Xmx1g to the JAVA_OPTS environemtn var
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Expert Comment

by:Giant2
ID: 24058865
If you use ApacheTomcatMonitor you can easily set (like objects said before) in the menu "Configure" and tab "Java".
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Author Comment

by:w_serena
ID: 24075264
Thanks a lot for replying.

>> add -Xmx1g to the JAVA_OPTS environemtn var

Where can I find that? I cannot find it in Control Panel --> System --> environment variables

>>If you use ApacheTomcatMonitor you can easily set (like objects said before) in the menu "Configure" and tab "Java".

How to use Apache tomcat Monitor? I think it comes in the sidebar once you install Tomcat. But I didn't install tomcat. I downloaded the zip from Apache site and upon unzipping started using it. There was no installation.
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LVL 92

Expert Comment

by:objects
ID: 24075345
> Where can I find that? I cannot find it in Control Panel --> System --> environment variables

add it

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Author Comment

by:w_serena
ID: 24083914
thanks a lot for replying.

I have made this setting. Still I am sometimes getting Out of Memory exception.

I tried setting the value as -Xmx2g for JAVA_OPTS, user variable. If I do that the tomcat server does not start.
shouldn't 2GB be acceptable when my system shows total RAM as 3.46 GB?
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LVL 92

Expert Comment

by:objects
ID: 24083949
try increasing it
how much ram do your webapps need?

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Author Comment

by:w_serena
ID: 24084376
2GB. I increased it as mentiond above by setting -Xmx2g for JAVA_OPTS but server doesn't start if I do that
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