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Managing and Customizing OpenCms 6 by Matt Butcher

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Flex Cache Administration

OpenCms uses a sophisticated caching mechanism to speed up processing. Without a cache, OpenCms would have to do a number of database lookups, compile one or more pieces of code (main JSP pages) and then execute the newly compiled code, and this can be a time consuming, resource-intensive process. To minimize the amount of repetitive work, OpenCms caches certain pieces of compiled code. Then, when the page is requested again (under similar conditions), OpenCms can simply execute the cached code instead of retrieving the uncompiled code from the database, compiling it, and executing it. The Flex Cache Administration screen in the administration view lets you tune or clear the cache.

This screen is complicated, and the ...

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