Mainframes White Papers
DBM1 Virtual Storage Tuning When Migrating SAP DB2 z/OS System to DB2 V8
Overview DB2 DBM1 address space virtual storage constraint has been an issue with SAP systems for a while, and as more function has been added to SAP applications, demand on DBM1 virtual storage has increased. Prior to DB2 V8, a number of SAP customers took advantage of dataspace bufferpools in order to move the virtual bufferpools out of the DBM1 address space, providing some virtual storage constraint relief. Other tuning items included maximizing the Extended Private Area virtual storage in the LPAR, by lowering common area allocations; such as Extended CSA and Extended SQA. DB2 V8 introduced 64-bit addressing for the DBM1 address space and moved many of the fixed block areas above the 2GB bar.
| Publisher | IBM | File Format | |
|---|---|---|---|
| Date Published | November 2006 | ||
| Format | White Papers | ||
| Topics | |||
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