Re: how to increase tomcat performance

[Antonio Fiol Bonnín]

Hi,

I am not Filip, but in my case most "hangings" were caused by too low settings of Tomcat's maxThreads / maxProcessors or too low setting for the database connections accepted.

And as Deepak says he is using Apache in front, I'd also check the Apache, just in case.

To check, wait for it to hang, and before stopping tomcat, execute on every machine involved:

netstat -n | grep SYN_RECV

If you see a large (more than 2-3) quantity of lines there, the involved service (local IP:port) is the blocking one.

SYN_SENT would be the counterpart of this. However, as you will not notice the hang immediately, it is unlikely that you see the SYN_SENT. If you do, blocking service is (remote IP:port).

Hope that helps.


Antonio Fiol



Parsons Technical Services wrote:

Filip,

Does this symptom sound similar to problems with memory leaks?

Doug

----- Original Message ----- From: "Filip Hanik (lists)" <[EMAIL PROTECTED]>
To: "Tomcat Users List" <[EMAIL PROTECTED]>; "Deepak Hegde"
<[EMAIL PROTECTED]>
Sent: Saturday, February 14, 2004 11:12 PM
Subject: RE: how to increase tomcat performance

first go over your configurations, make sure you have enabled enough

threads

for the connectors (read docs)

then get a performance profiler and go to work :)

tomcat is pretty optimized, so it could be something in your code

Filip

-----Original Message-----
From: Deepak Hegde [mailto:[EMAIL PROTECTED]
Sent: Saturday, February 14, 2004 8:03 PM
To: [EMAIL PROTECTED]
Subject: how to increase tomcat performance

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 when user
connection increases 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.

Somebody please help me ..

Regards,
Deepak

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