Hi

Thx for the initial reply

>>That seems unlikely. 100% of the system memory, or 100% of the memory that has been
allocated to it?

No As the no of users Increase from 400+ the stats repors java consumption as 100%

>>What happens when you hit "100% memory use"? Does the app crash? Or can no more users log in?

The main "Login page" from the web application is not appearing for some of the users

>> Do you actually need 300 simultaneous connections for your application?

Increasing this ,we were able to reduce the restart option on TOMCAT from 6 frequently
hrs to 12+ hrs

>> Evidently not. Do you use sessions for anything?

Yes we hold the User's info in a String array stored into the session ,to track signall the AAA CISCO router to remove the user ,when in idel state for more then 24 hrs.



Any more updates can be attached in the next mail.


With regards
Karthik

Christopher Schultz wrote:
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Karthik,

karthikn wrote:
| On Unix Machine The Residential Memory for the TOMCAT5.5.23 is some
| times  100%    [ 500 users ]

That seems unlikely. 100% of the system memory, or 100% of the memory
that has been allocated to it?

| Hence more no of people  are not able to use the web application.

What happens when you hit "100% memory use"? Does the app crash? Or can
no more users log in?

| We have raise the Thread Pool from 150 [default]  to  300 in server.xml

Do you actually need 300 simultaneous connections for your application?

| Our Application is very simple and does not hold any memory resources.

Evidently not. Do you use sessions for anything?

| We have to frequently restart the Tomcat every  12 hrs, Why is this
| happening?

I suspect that you /are/ holding on to objects in memory, and you are
exhausting your heap. Do you have any error messages that you can post
to the list?

You should use a profiler to see what is going on with memory in your
running application.

- -chris
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