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From Phillip Morelock <subscripti...@phillipmorelock.com>
Subject Re: Tomcat 4.0.1 and memory usage
Date Thu, 06 Jun 2002 22:21:40 GMT
Anything you would normally pass on the command line to "java" -- you put
into CATALINA_OPTS

At some point in the script that starts tomcat, you'll see a line like
(*approximately*)
$JAVACMD -classpath $SOMETHING $CATALINA_OPTS

or something like that -- so you can see that $CATALINA_OPTS just gets
passed in as a string -- are you on windows?  oh well, close enough, you get
the idea i think  ;)

I don't know the minimum it requires -- I guess that would depend on usage
and how many servlets/jsp's you have.

I set mine (for mid-sized website on one server) to 256-384 and it seems
almost excessive for the amount of traffic, etc.  Play with it a bit, I
guess would be my answer, but maybe someone else knows a more precise
measurement.

cheers
fillup



On 6/6/02 2:50 PM, "Tia Haenni" <java4freak@kc.rr.com> wrote:

> Ok, that's simple enough. Does that limit the amount of RAM Tomcat can
> use? Do you know the minimum it requires? Also, would the java
> -verbosegc also be set in this way? TIA
> 
> Phillip Morelock wrote:
> 
>> Just like you set CATALINA_HOME
>> 
>> set CATALINA_OPTS to the string you want to feed the vm.
>> 
>> so 
>> 
>> %CATALINA_OPTS%  should be
>> -Xmx### -Xms###
>> 
>> fillup
>> 
>> 
>> On 6/6/02 2:38 PM, "Tia Haenni" <java4freak@kc.rr.com> wrote:
>> 
>>  
>> 
>>> I have searched the archives for this topic, but I need more information
>>> to understand.  I need to limit the amount of memory used by Tomcat. I
>>> have Tomcat 4.0.1 running as an nt service on a Windows 2000 server box
>>> with redirects coming from IIS 5.0. I heard of using java -verbosegc to
>>> monitor gc, but as the service points at <tomcat_home>\bin\tomcat.exe,
I
>>> don't know where this should be set. I understand the concept of setting
>>> for the JVM -Xmx###m and -Xms###m where ### is the amount of RAM to
>>> allocate for Tomcat, but again I do not know where this is set. Please
>>> help. TIA 
>>> 
>>> 
>>> 
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>>  
>> 
> 
> 
> 
> 
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