Home | 2.1.2 Where caching is performed | 2.1.4 Static versus dynamic object caching


2.1.3 The value of Web caching

Web caching involves storing HTML pages, images, servlet responses, and other Web-based objects for later retrieval. There are three significant advantages to Web caching:

Reduced bandwidth consumption (fewer requests and responses that need to go over the network).

Reduced server load (fewer requests for a server to handle).

Reduced latency (since responses for cached requests are available immediately, and closer to the client being served). Together, they make the Web less expensive and better performing.

These advantages add up to a better performing Web site and therefore a better user experience.

The advantages of using DynaCache (DC) can be seen in performance tests run by the WebSphere performance team using the Trade application. Figure | -3 shows comparative results for using DynaCache in an EJB and JDBC application running on WebSphere Application Server 6.0.2, and Figure | -4 shows the comparable results for WebSphere Application Server 6.1. The Trade application used the Dynamic Mapping (DMAP) JSP interface to DynaCache.

Figure 2-3 Impact of DynaCache in WebSphere V6.02

Figure 2-4 Impact of DynaCache in WebSphere V6.1

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