The URL invocation cache holds information
for mapping request URLs to servlet resources. This cache is Web container-based,
and shared for all Web container threads. A cache of the requested
size is created for each Web container thread that is available to
process a request. The default size of the invocation cache is 50.
If more than 50 unique URLs are actively being used (each JavaServer
Page is a unique URL), you should increase the size of the invocation
cache.
Before you begin
A larger cache uses more of the Java™ heap,
so you might also need to increase the maximum Java heap
size. For example, if each cache entry requires 2KB, maximum thread
size is set to 25, and the URL invocation cache size is 100; then
5MB of Java heap are required.
About this task
To change the size of the invocation cache:
Procedure
- In the administrative console, click and select the application server
that you are tuning.
- Click Java and Process Management.
- Click Process Definition under
Additional Properties.
- Click Java Virtual
Machine under Additional Properties.
- Click Custom Properties under Additional Properties.
- Specify invocationCacheSize in the Name field and
the size of the cache in the Value field. The default size
for the invocation cache is 500 entries. Since the invocation cache
is no longer thread-based, the invocation cache size specified by
the user is multiplied by ten to provide similar function from previous
releases. For example, if you specify an invocation cache size of
50, the Web container will create a cache size of 500.
- Click Apply and then Save to save your changes.
- Stop and restart the application server.
Results
The new cache size is used for the URL invocation cache.