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Posted to users@tomcat.apache.org by "Clemens, Michael" <Mi...@epos-cs.de> on 2002/06/19 15:57:10 UTC
Memory blowup and performance problems
hi,
i have a problem with running tomcat 4.03 on my linux box. after starting
tomcat, java takes nearly all my memory (~500megs) until theres no more. for
this it needs about 1 day. now tomcat needs about 1 to 2 minutes to react,
escecially after leaving him alone for a few hours. memory is never given
back to the system by him.
michael
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RE: Memory blowup and performance problems
Posted by Chris Newland <ch...@emorphia.com>.
Hi Michael,
Can you tell me how many requests you are receiving in a day?
Do these requests each result in a JSP compilation? There is a known memory
leak in the javac compiler so this may be the problem.
How are you using Tomcat? Servlets? JSP? Cocoon?
Best Regards,
Chris
> -----Original Message-----
> From: Clemens, Michael [mailto:Michael.Clemens@epos-cs.de]
> Sent: 19 June 2002 14:57
> To: tomcat-user@jakarta.apache.org
> Subject: Memory blowup and performance problems
>
>
> hi,
>
> i have a problem with running tomcat 4.03 on my linux box. after starting
> tomcat, java takes nearly all my memory (~500megs) until theres
> no more. for
> this it needs about 1 day. now tomcat needs about 1 to 2 minutes to react,
> escecially after leaving him alone for a few hours. memory is never given
> back to the system by him.
>
> michael
>
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> To unsubscribe, e-mail:
> <ma...@jakarta.apache.org>
> For additional commands, e-mail:
> <ma...@jakarta.apache.org>
>
>
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Re: Memory blowup and performance problems
Posted by Marius Schwarz <sc...@power-netz.de>.
Hello Michael
On 19-Jun-02, you wrote:
> hi,
>
> i have a problem with running tomcat 4.03 on my linux box. after starting
> tomcat, java takes nearly all my memory (~500megs) until theres no more.
> for this it needs about 1 day. now tomcat needs about 1 to 2 minutes to
> react, escecially after leaving him alone for a few hours. memory is never
> given back to the system by him.
you use a database , right?
Check your db code for synced methods and open connections AND for
deadlocks in your database itself.
Why?
1. if you don`t get an answere from the db in time tc will open a new task
for it
-> increasing number of JVM without ANY performance increase.
2. syncronzied methodes can cause 1. , depends on the requests
3. objects need memory and resources. They can only be free if they are no
longer used.
Regards
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