Inter-Db2 interest and GBP-dependency
For Db2 data sharing environments, the concepts of inter-Db2 read/write interest and group buffer pool dependency (GBP-dependency) are closely related.
Whenever inter-Db2 read/write interest exists on a page set or partition, that object is GBP-dependent. Conversely, if no inter-Db2 read/write interest exists on a page set or partition, the object is usually not GBP-dependent. Sometimes an object still has pages cached in the group buffer pool, and it can remain GBP-dependent even after the inter-Db2 read/write interest has gone away. The following table shows you how to determine if a page set is GBP-dependent based on the inter-Db2 interest of one member and all other members.
One member's interest | Other members' interest | Is page set GBP-dependent? |
---|---|---|
Read-only | None, Read-only | No |
Read-only | Read/Write | Yes |
Read/Write | None | No 1 |
Read/Write | Read-only | Yes |
Read/Write | Read/Write | Yes |
Exception:
|