DB2 migration to V10 and DB2 access path selection ZPARM settings
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Below is a set of optimiser-related DB2 system parameters (ZPARMS) and their V10 default values. If the setting of any of these system parameters in your environment does NOT match the V10 default, then please re-evaluate the setting before migrating to DB2 10 for z/OS. If you need special assistance from IBM, please open a problem record (PMR).
MACRO ZPARM DEFAULT V10
DSN6SPRM OPTIOWGT ENABLE
DSN6SPRM OPTIXIO ON
DSN6SPRM OPTXQB ON
DSN6SPRM STATCLUS ENHANCED