1. From <jira-install>/bin (Standalone) or <Tomcat-home>/bin (WAR installation), open setenv.sh.
2. Find the section JVM_SUPPORT_RECOMMENDED_ARGS=
3. Refer to the list of parameters below.

Add all parameters in a space-separated list, inside the quotations.

1. From <jira-install>/bin (Standalone) or <Tomcat-home>/bin (WAR installation), open setenv.bat.
2. Find the section set JVM_SUPPORT_RECOMMENDED_ARGS=
3. Refer to the list of parameters below.

Add all parameters in a space-separated list, inside the quotations.

1. Identify the name of the service that JIRA is installed as in Windows ( Control Panel > Administrative Tools > Services ):
   
   In the above example, the SERVICENAME is: JIRA030908110721
2. Open the command window from Start >> Run >> type in 'cmd' >> Enter
3. cd to the bin directory of your JIRA Standalone instance, or the bin directory of your Tomcat installation if your are running JIRA WAR.
4. Run:

   tomcat6w //ES//%SERVICENAME%
   

   .
   In the above example, it would be tomcat6w //ES//JIRA030908110721
   
5. Click on the Java tab to see the list of current start-up options:
   
6. Append any new option on its own new line by adding to the end of the existing Java Options. Refer to the list of parameters below.

1. Go to {{Start >> Run, and run "regedit32.exe".
   
2. Find the Services entry:
   32-bit: HKEY_LOCAL_MACHINE >> SOFTWARE >> Apache Software Foundation >> Procrun 2.0 >> JIRA
   64-bit: HKEY_LOCAL_MACHINE >> SOFTWARE >> Wow6432Node >> Apache Software Foundation >> Procrun 2.0 >> JIRA
   
3. To change existing properties, especially increasing Xmx memory, double-click the appropriate value.
   
4. To change additional properties, double-click options.
   
5. Refer to the list of parameters below. Enter each on a separate line.