I haven't looked much at the windows side of things (so everyone else, please feel free to step in and correct me), but it looks like you need to find the right place to set the JAVA_OPTIONS environment variable.

It looks like you have two options:

Set JAVA_OPTIONS environment variable at the system level
Set JAVA_OPTIONS in the run_vufind.bat script (probably not best practice, the above method is likely preferable)
In either case, you can then follow the performance documentation here:

Hope that helps.

Benjamin Mosior

From: Tomlin, Camille []
Sent: Wednesday, March 27, 2013 10:50
Subject: [VuFind-General] Need Java Tuning Help on Windows box

We are running VuFind 1.1 on a Windows machine with Apache 2.2.17 and 8GB of RAM. We are having a difficult time tuning Java. Could someone explicitly explain which files (and their locations) need to be updated to increase memory to Java in this environment.