To reduce the number of times that the disk is accessed, read and write operations on the data of a database instance are buffered. The relevant main memory structures are called caches. They can be dimensioned appropriately using the corresponding database parameters.
You can use the Database Manager to display information about the caches, such as the hit rate.
Database Manager GUI, Displaying Cache Information
Database Manager CLI, Displaying Information About the Database Instance
In SAP systems, you use the Database Assistant
to display database information, or the liveCache
Assistant for liveCache instances.