Tuning your applications with the Quest Central ... - Quest Software

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Minimizing Physical IO in Oracle9i � Very significant new functionality to help you optimize your memory allocation: – Buffer cache, shared pool and pga advisories allow you to determine the best way to allocate memory across these structures. – Information in v$sql_plan_statistics helps you allocate segments into keep and recycle pool
Using the 9i Advisories � Three views show effect of altering memory settings: – V$db_cache_advice: how much physical IO would be saved by changing buffer cache sizes – V$shared_pool_advice: change in parse times for various shared pool sizes – V$pga_target_advice: change in IO to temporary segments for various pga_aggregate_targets
Page 1 and 2: Top Tips for Optimizing Oracle Data
Page 3 and 4: Adopt a Methodical Approach � Bes
Page 5 and 6: Quest Tuning Methodology (2) � On
Page 7 and 8: Quest Tuning Methodology (4) � On
Page 13: Examining Contention � Look at th
Page 16 and 17: Enqueue Waits � These occur when
Page 19 and 20: Investigating the lock waits
Page 22 and 23: Free Buffer and Write Complete Wait
Page 24 and 25: Log Switch � When a redo log fill
Page 27: Minimize Physical IO � Our aim is
Page 31 and 32: Mining v$sql_plan � Keep and recy
Page 33 and 34: Optimize IO � Basic principle is
Page 35 and 36: Quest Central Health Check � A no
Page 37 and 38: Q & A � Register for a Free Datab

Tuning your applications with the Quest Central ... - Quest Software

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