ACTIVE MEMORY EXPANSION AND RDBMS META DATA AND TOOLING

摘要

Techniques are described for estimating and managing memory compression for query processing. Embodiments of the invention may generally include receiving a query to be executed, ascertaining indicatory data about the retrieved data, and selectively compressing a portion of the data in memory according to the indicatory data. In one embodiment, the amount of compression performed during each query execution is recorded and outputted to assist in adjusting the selective compression process.