DB2 for z/OS V8 - Guide Share France

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IBM objective for regression is less than 10% Not only Acctg Class 2 increase expected Must consider CPU reduction in DB2 system address spaces © 2007 MConsulting - cristian@molaro.be 34
Rebind all packages/plans Multi-row FETCH and INSERT MQTs Increase size of buffer pools Long term page fix buffer pools Fix the buffer pages once in memory and keep them fixed in real storage 0% to 8% CPU savings Only if enough real storage to back bpools 100% Activated by -ALTER BPOOL(x) PGFIX(YES) Performance benefit is inversely proportional to the buffer hit ratio: ○ The higher the hit ratio, the lower the benefit ○ Apply to small buffer pools with lots of I/Os © 2007 MConsulting - cristian@molaro.be 35
Page 1 and 2: Cristian Molaro MConsulting BELGIUM
Page 3 and 4: © 2007 MConsulting - cristian@mola
Page 5 and 6: Critical APAR: ====================
Page 9 and 10: DFSORT is mandatory for IBM utiliti
Page 11 and 12: SPAS stored procedures not longer s
Page 13 and 14: WLM address space fails at start: D
Page 17 and 18: CM EN FM NF M CM EN FM NF M NF M CM
Page 19 and 20: DSN TRKS CYLS DB TS CI Size RECORDS
Page 21 and 22: Total elapsed time = 5 min Copies
Page 23 and 24: Compare EXPLAIN tables V7 vs. V8:
Page 27 and 28: 64 bits addressing is NOT the solut
Page 29 and 30: STATISTICS EXEC REPORT DDNAME(STATS
Page 31 and 32: Paul Fletcher’s REXX for READS an
Page 33: IBM published CPU expected changes
Page 37 and 38: New in V8: BACKUP SYSTEM RESTORE
Page 39 and 40: Define separate ICF Catalogs User
Page 41 and 42: Creates full volume dasd copies of
Page 43 and 44: Restores DB2 system to specified po
Page 45 and 46: Good news: sliding secondary alloca
Page 47 and 48: Default PRIQTY 1 cylinder for non-
Page 49 and 50: INSTALL DB2 - SIZES PANEL 2 ===> Ch
Page 51 and 52: Materialized Query Tables = MQTs T
Page 53 and 54: Original query: SELECT DISTINCT(REP
Page 55 and 56: MQT creation: CREATE TABLE MQT.TEST
Page 57 and 58: New access path: © 2007 MConsultin
Page 59 and 60: New in V8: Statistics Advisor Lis
Page 63 and 64: zIIPs NOT PADDED Indexes Backwards
Page 65 and 66: Moving to V8 is good Take document

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