Object documentation I/O Buffer Cache Locate the document in its SAP Library structure

One important cache of a SAP DB database is the I/O buffer cache.

When the database system is started, the I/O buffer cache is created in the main memory in accordance with the size entered in the database parameter CACHE_SIZE and is managed via the page pool.

A certain number of pages of the I/O buffer cache are made available to the converter. The remaining pages are made available to the data cache.

If the converter requires more pages during database operation, the distribution of all I/O buffer cache pages between the converter and data cache is changed dynamically to meet this requirement.