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Object documentation Data Cache Locate the document in its SAP Library structure

The data cache contains the last read- or write-accessed pages of the data volumes.

The data cache is a main memory structure that is shared simultaneously by all active users.

The data cache is dimensioned dynamically, which means that you cannot directly influence the size of the data cache. The required data cache pages are taken from the I/O buffer cache, which is used jointly by the converter and the data cache. The size of the I/O buffer cache is determined by the database parameter CACHE_SIZE. If the converter grows, the number of data cache pages is reduced accordingly.

The hit rate, that is the proportion of successful accesses in the total number of accesses, is a crucial measure of performance. Successful access means that the required data was already available in the data cache when it was accessed.

 

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