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Posted to users@tomcat.apache.org by Arnab Chakravarty <ac...@sapient.com> on 2004/02/18 11:30:23 UTC
RE: Réf. : RE: Réf. : Re: Very Very Slow performance of Tomcat
Hi,
Look the thread dump generates some stack trace information which can help you identify the portion of the source where the code might be getting stuck. (Total Number of thread running/active in JVM) You have to check those portions of the code...is there any infinite loop while getting connections or in some other way...
Importantly have you ever tried doing any performance testing / load testing for your application. That helps determine where the application generally breaks!!! or the limits of the application :).
Hope thinks works out for you.
Arnab C
-----Original Message-----
From: meissa.Sakho@assetmanagement.natexis.fr
[mailto:meissa.Sakho@assetmanagement.natexis.fr]
Sent: Wednesday, February 18, 2004 3:26 PM
To: Tomcat Users List
Subject: Réf. : RE: Réf. : Re: Very Very Slow performance of Tomcat
Arnab,
Do you know how to use ThreadDump in order to detect
application hanging reasons ?
_______________________________________________
NATEXIS ASSET MANAGEMENT
Meissa SAKHO
01 58 19 45 71. . . . . . . . . . . . (84571)
meissa.sakho@assetmanagement.natexis.fr
"Arnab Chakravarty" <ac...@sapient.com>
18/02/2004 10:05
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Pour : "Tomcat Users List" <to...@jakarta.apache.org>
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Objet : RE: Réf. : Re: Very Very Slow performance of Tomcat
Hi,
Can u check the total number of concurrent connections (Apache) when the
problem occurs:
The way to do this is:
ptree | grep -c httpd : Would give the number of concurrent connections.
The values of MaxClients / maxProcessor varies from application to
application and the load one would expect when the application is live.
ThreadDump helps detecting where the application is getting
hanged...connections problems is one of the issues...can see the same in
the dumps...
Arnab C
-----Original Message-----
From: meissa.Sakho@assetmanagement.natexis.fr
[mailto:meissa.Sakho@assetmanagement.natexis.fr]
Sent: Wednesday, February 18, 2004 2:11 PM
To: Tomcat Users List
Subject: Réf. : Re: Very Very Slow performance of Tomcat
Antonio,
I'm facing to the same performance problems with Tomcat.
My the maxProcessor value is equal to 75 while
the Apache's MaxClients is equals to 150.
the MaxKeepAliveRequests of apache is equal to 100
Do you understand the relationship between theses attributes ?
_______________________________________________
NATEXIS ASSET MANAGEMENT
Meissa SAKHO
01 58 19 45 71. . . . . . . . . . . . (84571)
meissa.sakho@assetmanagement.natexis.fr
Antonio Fiol Bonnín <fi...@terra.es>
18/02/2004 08:55
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Pour : Tomcat Users List <to...@jakarta.apache.org>
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Objet : Re: Very Very Slow performance of Tomcat
Is maxProcessors lower than Apache's MaxClients?
Are you hitting the max. number of connections to your database?
When it goes slow, does it hang later?
Are you closing all your connections to the DB?
Q: ---> Is there a "checklist" somewhere for this kind of things? It
would be useful for nearly everyone.
Antonio Fiol
Deepak Hegde wrote:
>Hi All,
>
>I am running Tomcat 4 and Apache 1.3 and Struts Framework on Sun Sparc
>machine having O.S 5.8 version.
>
>Web application is developed to use Postgres Database also.
>
>I am facing lots of performance issues with Tomcat i.e sometimes tomcat
process hangs and website stops opening and some times it goes very slow.
The Problem gets sloved when i restart the tomcat service again.
>
>I am really struggling find out the reason for this....
>
>Somebody please help me ..
>
>Regards,
>Deepak
>
>
>
>
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