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From "Allistair Crossley" <Allistair.Cross...@QAS.com>
Subject RE: out of memory problem. Help!
Date Mon, 19 Jan 2004 17:08:04 GMT
This is very interesting to hear. I can believe it too...we lose between 400K and 5MB per request
and Tomcat 5.0.16 bombs out at 155.

We have invested in JProfiler now to see why but your comment is curious. Are you on the development
team? When will 5.0.18 become stable...does not seem to be a binary download yet

Cheers ADC


-----Original Message-----
From: David Strupl [mailto:david@solutions.cz]
Sent: 19 January 2004 17:00
To: tomcat-user@jakarta.apache.org
Subject: Re: out of memory problem. Help!


If you use tomcat 5.0.x upgrade to 5.0.18. If you use 4.1.x downgrade to 
4.1.27. There is a significant memory leak in tomcat in 5.0.16, 4.1.28(29).

Hope this helps,

David

Christian Witucki wrote:
> We fixed our session timeout to 15 minutes for 100 users and Tomcat
> hasn't crashed for 36 hours.  Does anyone know how we can adjust for
> the possibilities of 1000's of users???
> 
> Christian Witucki Network Analyst 375 Essjay Road Williamsville, NY
> 14221 716-631-3001 x3812
> 
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> 
>>>> sanjeev@julysystems.com 01/19/04 01:20AM >>>
> 
> 
> Check session-timeout in web.xml. -1 is never timeout 
> <session-timeout>-1</session-timeout>
> 
> -----Original Message----- From: Christophe Andreoli
> [mailto:andreoli@gsf.de] Sent: Friday, January 16, 2004 9:19 PM To:
> Tomcat Users List Subject: Re: out of memory problem. Help!
> 
> "Shapira, Yoav" wrote:
> 
>> Howdy,
>> 
>> 
>>> root cause
>>> 
>>> java.lang.OutOfMemoryError
>>> 
>>> 
>>> It happens When the corresponding request returns more than
> 
> 20000-30000
> 
>>> rows from the database, not every time
> 
> 
> 
> 
> 
>> Perhaps you should allocate your JVM more memory, by using the Java
>> 
> 
> -Xmx
> 
>> parameter.
> 
> 
> I did it and I gave 512 Mb.
> 
> It works better but why are the 2000 objects are not garbaged after
> each request ?
> 
> 
> 
> 
> 
> 
> 
> 
> Alternatively, consider a system design that retrieves a
> 
>> smaller, fixed number of rows instead of "20000-30000" and lets the
>> 
> 
> user
> 
>> scroll, say 100 rows at a time.
>> 
>> Yoav Shapira
>> 
> 
> 
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