DB2 9 & 10 for z/OS Overview

Migration Planning WorkshopOn Demand Buffer Pool storage• This gives you the ability to grow your buffer pool over time asopposed to allocate it all at first usage• Maximum size will be VPSIZE• This can be helpful to large buffer pools, where the pool willnot grow to the maximum size over the length of time untilDB2 is recycled.• For Index only query, no data pages will be allocated in thebuffer pool– Only index pages will be allocated– V9 – Index only on non padded indexes on varcharcolumns– v10 – Additional columns in index can make more queriesindex only211© 2011 IBM Corporation