What is the method for caching tables in DB2?

In DB2, there are two ways to utilize cache tables.

1. Using DB2 cache table spaces: DB2 offers a special type of table space called cache table space (CTB). When creating a table space, you can specify its type as CTB and choose a cache size for the table space. When the type of table space is CTB, DB2 will cache the data and index pages of that table space in memory to improve data access speed.
2. By utilizing the DB2 cache table option, you can store the data and index pages of a table in memory to improve access speed. This option can be set to YES while creating or modifying a table statement in DB2.

It is important to note that when using cache tables, the method should be balanced and chosen based on the specific situation. Cache tables can improve data access speed, but they also consume a large amount of memory resources. Therefore, when using cache tables, it is necessary to consider the system’s memory capacity and performance requirements, and properly configure the cache size.