Print Page - Increase the Memory

Title: Increase the Memory
Post by: ipmurali on 15 Feb 2010 12:27:17 AM

Problem:
For some reason the Cognos service hangs and fails to responds till you manually go and restart the service.
I check in the error logs of Cognos server, it shows following error

Runtime Exception stack trace:
java.lang.OutOfMemoryError

As per the below link
http://www-01.ibm.com/support/docview.wss?uid=swg21344109 (http://www-01.ibm.com/support/docview.wss?uid=swg21344109)

Changed the Maximum memory in MB to 1536 (Since server having 3 GB RAM).
But after that the Cognos service fails to start.
throwing the error

[ERROR] CFG-ERR-0106 Cognos Configuration did not receive a response from the Cognos 8 service in the time allotted.
Check that Cognos 8 service is available and properly configured.

Help me to fix this problem.

thanks

Title: Re: Increase the Memory
Post by: smiley on 15 Feb 2010 02:19:42 AM

Make it slightly smaller then 1536 (as long as it's devidable by 8 )
The Cognos 8 startup will register this memory block at the OS, and you only have 2 gig user mode memory
space to play with in total. It means there's not much left for the bibusses to consume.
Usually the java stack get's consumed on an environment with a lot of switching users, running a small number of reports.
If that is the case, you should start thinking about a dedciated content manager.
Therefore some description of your environment would help.

Title: Re: Increase the Memory
Post by: ipmurali on 16 Feb 2010 01:27:26 AM

Thanks Smiley,
Yes, I made it 1472, that is the maximum I can give.
We are using a dedicated CM (Seperate Databse server).
MS SQL server 2000 is the CM database.

Let me see how the performace now after changing the mem size to 1472.

thanks.

Title: Re: Increase the Memory
Post by: smiley on 16 Feb 2010 01:44:25 AM

You are using a dedciated content store (database), not a dedciated content manager (application tier; java servlet)
As for performance; as i said earlier you have 2 gig user mode memory space to devide between java.exe and the bibusses. The more you give to java, the less there is to calculate reports. (so reports with local processing suffer)

Title: Re: Increase the Memory
Post by: johnpenna on 17 Feb 2010 02:08:06 PM

set it to 1024 in cognos connection.

We had some horrific issues with memopry leakage..

We increased the memory to 16GB!!!! from 4...Still had the problem..We had to restart the services after running a 40page investor report..You could see the process not releasing in task manager...

basically a cognos consultant in Ottowa told us to redesign our FM model and reports...

This seem to work..Make the SQL more effecient..Increasing the memory wont allow the reports to run faster just allows more reports to run at once.

Title: Re: Increase the Memory
Post by: cognosbobby on 19 May 2010 11:14:30 AM

HI,

Good Morning,

Any One Does Haveany idea to install Cognos 8 with linux and solaris ...

if the guys have any document could you pls share to my id

Cognos.bobby@gmail.com

that document it is very helpful to me

Thanks in Advance
Cognos Bobby

Title: Re: Increase the Memory
Post by: smiley on 19 May 2010 02:43:21 PM

Quote from: cognosbobby on 19 May 2010 11:14:30 AM
Any One Does Haveany idea to install Cognos 8 with linux and solaris ...
if the guys have any document could you pls share to my id

http://public.dhe.ibm.com/software/data/cognos/documentation/docs/en/docdl/C8BI8.4.1_RP1.exe

COGNOiSe.com - The IBM Cognos Community

IBM Cognos 8 Platform => COGNOS 8 => COGNOS 8 Administration => Topic started by: ipmurali on 15 Feb 2010 12:27:17 AM