Chris,
Thanks for your input. The application in question is a content management one which is developed using Vignette. The Vignette support team suggested the increase in heapsize as a first measure. We are analyzing the code itself for leaks. It may be that on jsp pages we are not closing connections properly.
I am wondering whether:
- simply editing the catalina.sh file as I described would do it or for proper application of an increase, we may need to use commands external to the file such as export or set?
- whether the increase made in catalina.sh may need to be made elsewere in other files?
Also what is stacksize permgensize and how can these play a role in how Tomcat performs and could their setting be related to OutOfMemory errors?
Thanks,
Ibrahim
| Christopher Schultz <[EMAIL PROTECTED]>
07/17/2006 09:02 PM
|
To: Tomcat Users List <users@tomcat.apache.org> cc: Subject: Re: Increase Heapsize |
Barry and Ibrahim,
> I thought maybe it was done in the startup.bat file by changing the
> properties and the initial environment space (defaulted usually to
> Auto to 4096). Is this not correct? You might try right-clicking
> startup.bat, and under the Memory tab try changing the expanded
> memory or extended memory values if they're defaulted to a certain
> value?
No, this isn't right: the properties you are talking about are for the
batch process itself (on a win32 machine). When startup.bat calls
"java", those values are not inherited by the VM.
> Do I simply increase the value after 'Xmx' in the JAVA_OPTS variable
> in catalina.sh file?
This ought to work for you.
Although it is not unheard of to legitimately run out of memory (i.e.
get OutOfMemoryErrors), you ought to think about whether or not
increasing your heap size is actually going to fix your problem: often,
you have a memory leak and it's better to test your app with a small
heap because you can find it more quickly (i.e. less memory to burn
through before you run out).
I strongly advise you to critically examine your code to determine if
the OutOfMemoryErrors are being caused by you, or if you really do just
need more memory allocated to the JVM.
-chris
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