The heap can only be changed on the server side.
For DE running on Linux/UNIX system
1. Login to the server,
2. Navigate to DE install directory. Note: Get install location by entering getproperty property("lax.root.install.dir")in CLI (Desktop Client)
3. Next, change directory (cd) to bin directory and locate startServer file.
4. Edit or vi the startServer file and look for "MAX_HEAP_SIZE". Change the heap number accordingly.
E.g. If you want to increase to 6 GB, then heap will be like this: MAX_HEAP_SIZE=6144
5. Once done, save the file and you restart the DE service.
For DE running on Windows OS
1. Login to the server,
2. Navigate to DE install directory. E.g. C:\Program Files\CA\Workload Automation.
3. Then change directory (cd) to bin directory and locate startServer.lax file.
4. Edit or vi the startServer.lax file and look for "MAX_HEAP_SIZE". Change the heap number.
E.g. If you want to increase to 4 GB, then heap will be like this: MAX_HEAP_SIZE=4096
5. Once done, save the file and you restart the DE service.
Note: Always backup files before making changes to them.