Increase JAVA heap size in tomcat

Issue:

There are scenarios, or cases, where the application might run out of java heap space. And, as a result, the sync would break mostly due to very large data sync; or, large set of data that sync between applications. In such cases, we can force the tomcat application to use dedicated java heap memory so the sync won’t break.

Solution:

This can be done by following the steps below:

Windows:

1. Edit the file catalina.bat file located in <<install-directory>>/bin and add the following property: 

set JAVA_OPTS=-Xms512m -Xmx4096m before, or after, the line, set JRE_HOME=..\jre.

After adding the property, restart the tomcat service or the tomcat application.

(512 is the minimum and 4096 is the maximum heap memory that is allotted to this application, please set the values according to the available RAM memory on your server machine).

2. Also, edit service.bat and change the heap size as shown below - to, certain value based on the RAM available.

Once you increase the size in service.bat then, you have to re-register the tomcat service for the changes to take effect.

Go to Windows services, check for the tomcat service - usually, this will be as shown below:

To un-register the service, execute the following command by opening a command prompt service.bat, as administrator and, uninstall DBSync.

To re-register the service again, execute the command:

service.bat install DBSync.