DB2 9 & 10 for z/OS Overview

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Migration Planning WorkshopOptimization Evolution• Access Path Stability• Other Access Path StabilityImprovements– Optimization Hints• EXPLAIN Changes• REBIND PLAN...COLLID• Literal Replacement• Statistics Enhancements– Autostats– RUNSTATS Profiles– HISTOGRAM• Real Time Statistics• Virtual Indexes• Index Usage Improvements• Parallelism Enhancements142© 2011 IBM Corporation
Migration Planning WorkshopAccess Path Stability• REBIND PACKAGE... PLANMGMT(OFF | BASIC | EXTENDED)– Or REBIND TRIGGER PACKAGE• Options:– OFF:• Do not use plan stability• Package continues to have one active copy– BASIC:• Package has one active copy (Current) and one old (Previous) copy– EXTENDED (default):• One active (Current) and two old / preserved package copies• The preserved copies are the Previous and Original copies143© 2011 IBM Corporation
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