Task overview: Use the dynamic cache service to improve performance
Caching the output of servlets, commands, and JSPs (JSP) improves application performance. WebSphere Application Server consolidates several caching activities including servlets, web services, and WebSphere commands into one service called the dynamic cache. These caching activities work together to improve application performance, and share many configuration parameters that are set in the dynamic cache service of an application server. We can use the dynamic cache to improve the performance of servlet and JSP files by serving requests from an in-memory cache. Cache entries contain servlet output, the results of a servlet after it runs, and metadata.
The dynamic cache service works within an application server JVM, intercepting calls to cacheable objects. For example, it intercepts calls through a servlet service method or a command execute method, and either stores the output of the object to the cache or serves the content of the object from the dynamic cache.
- The dynamic cache service is enabled by default. We can configure the default cache instance in the console. Refer to the Using the dynamic cache service topic for more information.
- Configure the type of caching that you are using:
- Configure servlet caching.
- Configure portlet fragment caching.
- Configure Edge Side Include caching.
- Configure command caching.
- Example: Caching web services.
- Configure the JAX-RPC web services client cache.
- Monitor the results of the configuration using the dynamic cache monitor. Refer to the Displaying cache information topic for more information about the dynamic cache monitor.
What to do next
To use the DistributedMap and DistributedObjectCache interfaces for the dynamic cache, refer to the Using the DistributedMap and DistributedObjectCache interfaces for the dynamic cache topic.
Subtopics
- Disk cache infrastructure enhancements
- Use the dynamic cache service
- Configure cacheable objects with the cachespec.xml file
- Eviction policies using the disk cache garbage collector
- Example: Caching web services
- Displaying cache information
- Disable template-based invalidations during JSP reloads
- Dynamic cache MBean statistics
- Example: Configure the dynamic cache service
- Dynamic cache PMI counter definitions
- Troubleshooting the dynamic cache service
- Configure cache replication
- Configure command caching
- Configure the JAX-RPC web services client cache
- Use the DistributedMap and DistributedObjectCache interfaces for the dynamic cache
- Use servlet cache instances
Related tasks
Tune the application serving environment
Configure servlet caching Configure portlet fragment caching Configure Edge Side Include caching