Monitoring in Sun GlassFish Web Space Server

Sign in to Web Space Server as admin user, and navigate to Control Panel -> Server -> Server Administration from the Welcome menu.

Figure 10–2 Monitoring of Resources

You can execute a resource maintenance action by selecting the Execute button next to any option in the following list of actions. You can execute the following actions:

Run the garbage collector to free up memory

Garbage collection frees memory occupied by unused objects. Click the Execute buttonnext to the Run the garbage collector to free up memory option. It increases the 'Free Memory' considerably.

Clear content cached by this VM

The Virtual Machine identifies the web page responses that are the same for each request and to remember (cache) the content. In some cases it can be useful to clear this cache to free the memory.

Clear content cached across the cluster

Executing this action clears the cluster cache.

Clear the database cache

Executing this action clears the database cache.

Reindex all search indexes

Executing this action removes all old search entries.

Generate thread dump

When the application server freezes or hangs or becomes sluggish for no apparent reason, it is recommended to generate a thread dump. Executing this action generates a thread dump.