Subsystem and Transaction Monitoring and Tuning with DB2 11 for z/OS

Buffer pools and group buffer pools

DB2 buffer pools are a key resource for ensuring good performance. This is becoming even more important as the difference between processor speed and disk response time for a random access I/O widens in each new generation of processor. With the decrease in cost of central storage, the opportunity to allocate more of this storage to buffer pools increases. General tuning goals include reducing the frequency of synchronous I/O suspensions, and lowering Other Read I/O suspension as well as Other Write I/O suspension ...