® Application Server is a Java
™ based process and requires a Java
virtual machine (JVM) environment to run and support IBM Sametime
® Advanced. You can tune the Java
runtime environment for performance by turning on verbose garbage collection and setting the heap size.
About this task
The following instructions contain settings that were tested in IBM
labs. These are just a starting point. Since your deployment might have a configuration unique to your site, these settings might require more adjustment.
Parent topic: Tuning WebSphere Application Server in a Sametime Advanced deployment
Troubleshooting WebSphere Application Server failed startup
- From Integrated Solutions Console, click Servers -> Application Servers -> stadvanced_server_name.
- Under Server Infrastructure, click Java and Process management -> Process Definition.
- Under Additional Properties, click Java Virtual Machine.
- Select the Verbose garbage collection check box.
- In the Generic JVM arguments field, type the following values. These values may vary depending on the amount of memory on the machine, operating system, and the load for the Sametime Advanced server.
-Xgcpolicy:gencon -Xms1536m -Xmx1536m -Xmn192m -Xmo1344m -Dsun.nio.MaxDirectMemorySize=524288000
Solaris does not support this setting.
- Click OK, and click Save to save changes to the master configuration.
- Click Custom properties.
- Click New.
- Add the property com.ibm.websphere.security.util.authCacheMaxSize, with a value of 120000.
- If Sametime Advanced is clustered, repeat the preceding steps for each node of the cluster.