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Background documentation Catalog Cache Locate the document in the library structure

The database system stores user-specific data and global data from the database catalog in the catalog cache. Data that has been displaced from the catalog cache is moved to the data cache.

A catalog cache is assigned to each user task at the start of the database session; the database system then releases this catalog cache after the database session has ended. The total of all catalog caches can increase up to the value that you have configured with the CAT_CACHE_SUPPLY database parameter.

The hit rate for the catalog cache should be over 85 percent. The lower limit for the hit rate depends largely on the application.

See also:

Concepts of the Database System, Special Database Parameters

 

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