Understanding Buffer Pool Performance and ... - Quest Software

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Buffer Pool Management Block-Based Buffer Pools You Can Expect More • Contiguous blocks of pages to be moved into contiguous portions of memory • Block-based buffer pools will be wasted if your application doesn’t perform sequential prefetch CREATE BUFFERPOOL bufferpool_name SIZE number of pages [IMMEDIATE | DEFERRED] [PAGESIZE integer [K]] [[NOT] EXTENDED STORAGE | NUMBLOCKPAGES number of pages [BLOCKSIZE number of pages]] [ALL DBPARTITIONNUMS | DATABASE PARTITION GROUP db_partition_group_name [,…]] [EXCEPT ON DBPARTITIONNUM[S] (db_partition_number1 [TO db_partition_number2] SIZE number of pages [,…])]
Buffer Pool Management You Can Expect More Hidden Buffer Pools • For improved availability only • DB2 creates small (16 page) buffer pools of each page size at database activation (4, 8, 16, 32k) • Hidden from the user, and used only when ordinary buffer pools cannot be allocated • Performance will be noticeably impacted, and DB2 will write a warning message to the administration notification log
Page 1 and 2: Understanding Buffer Pool Performan
Page 3 and 4: Introduction You Can Expect More Q:
Page 5 and 6: Buffer Pool Overview Basics and Ter
Page 7 and 8: Buffer Pool Overview Tuning Goals
Page 9 and 10: Buffer Pool Overview Prefetch You C
Page 11 and 12: You Are Here - DB2 Process Model Li
Page 13 and 14: Buffer Pool Management You Can Expe
Page 15: Buffer Pool Management You Can Expe
Page 19 and 20: Collecting Performance Metrics Tuni
Page 21 and 22: Collecting Performance Metrics DB2
Page 23 and 24: Collecting Performance Metrics •
Page 25 and 26: Collecting Performance Metrics •
Page 27 and 28: Evaluating Performance Metrics You
Page 29 and 30: Evaluating Performance Metrics Data
Page 31 and 32: Evaluating Performance Metrics Phys
Page 33 and 34: Evaluating Performance Metrics Pref
Page 35 and 36: Evaluating Performance Metrics Eval
Page 37 and 38: Evaluating Performance Metrics TCR
Page 39 and 40: Conclusion You Can Expect More •

Understanding Buffer Pool Performance and ... - Quest Software

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