How to Increasing the heap size (virtual memory) for JBoss in Quality Center

For Windows, you can increase the heap size by uninstalling/reinstalling the Quality Center Service and modifying the InstallJbossService.bat file. For Linux/Unix, you need to modify the run.sh file.
Recommended heap sizes, depending on the number of concurrent user sessions:
Small: 128 - 256MB ~ Up to 10 concurrent user sessions

Medium: 256 - 512MB ~ Up to 100 concurrent user sessions

Large: 512 - 1024MB ~ Up to 250 concurrent user sessions

Very Large: 1024 - 2048MB ~ Up to 350 concurrent user sessions
Notes:

The max value cannot be more than your max RAM size.

On any Windows 32-bit installation you cannot set a heap size larger than 1024 MB of RAM.

Uninstall/Reinstall QC Service for Windows:
Note: Verify that users are not working on Quality Center and Quality Center Service is stopped. 1. Open Command Prompt and navigate to "<Drive Letter:>\program files\Mercury Interactive\Quality Center\jboss\bin" folder.
Note: For Quality Center 9.0 and 9.2 the path is "<Drive Letter:>\program files\Mercury\Quality Center\jboss\bin"
           For Quality Center 10 the path is "<Drive Letter:>\program files\HP\Quality Center\jboss\bin

2. Execute the following command (this will uninstall the existing service):
   InstallJbossService.bat -uninstall
3.Edit the InstallJbossService.bat file.
Example:
If the heap memory is currently:
   set JAVA_OPTS=%JAVA_OPTS% -Xms256m -Xmx512m
increase the heap size as follows:
   set JAVA_OPTS=%JAVA_OPTS% -Xms512m -Xmx1024m
4. Save and close the InstallJbossService.bat.
5. Execute the following command (this will install the service with the modified heap size parameter):
   InstallJbossService.bat -c default (-help shows options)
6. Verify that the service has been installed, Control Panel -> Administrative Tools -> Services.
7. Start the Quality Center Service.
8. Check that the Quality Center Debug Console shows heap size that was specified as available memory:

For Quality Center 9.0 and 9.2:
   http://hostname:8080/qcbin/servlet/tdservlet?method=debuginfo
   http://hostname:8080/sabin/servlet/tdsiteadminservlet?method=debuginfo

For Quality Center 10:
   http://hostname:8080/qcbin/debug

Notes:

If you are using a cluster environment, the hostname should be the cluster machine name, and you will need to apply the above steps to each cluster.

Also edit the run.bat file to ensure it is synchronized with the way the QC service runs.

Add the following parameter in site administration's 'Site Configuration' tab to grant access to the debug info log:
     Name: DISABLE_CONSOLE_DEBUG_INFO
     Value: N Modify the run.bat file:
1. On the application server, locate the JBoss bin folder under your TD for QC installation. By default, the location is <System Drive:>\Program Files\Mercury Interactive\Quality Center\JBoss\bin. Note: For Quality Center 9.0 and 9.2 the path is <System Drive:>\Program Files\Mercury\Quality Center\JBoss\bin.
           For Quality Center 10 the path is <System Drive:>\Program Files\HP\Quality Center\JBoss\bin
2. Edit the run.bat file (or run.sh for Linux/Unix).
Example:
If the heap memory is currently:
   set JAVA_OPTS=%JAVA_OPTS% -Xms256m -Xmx512m
increase the heap size as follows:
   set JAVA_OPTS=%JAVA_OPTS% -Xms512m -Xmx1024m
3. Save and close the run.bat.
4. Execute the run.sh file only for Linux/Unix.