DB2 for z/OS V8 - Guide Share France

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Why? SPROC are invalidated in V8 before rebind Get V8 optimizer benefits Data types mismatches become stage 1 Need to perform a controlled REBIND process No need to REBIND in NFM Have a list of critical packages to verify Must see the difference of an access path change because an application change A single worse statement avoids package rebind © 2007 MConsulting - cristian@molaro.be 22
Compare EXPLAIN tables V7 vs. V8: If Cost increases: If Cost stays the same: If Cost decreases: investigate rebind rebind Create a baseline in V7 in dummy collection if not EXPLAIN = YES Use DSNTESC to create tables: PLAN_TABLE DSN_FUNCTION_TABLE DSN_STATEMNT_TABLE DSN_STATEMENT_CACHE_TABLE © 2007 MConsulting - cristian@molaro.be 23
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: Total elapsed time = 5 min Copies
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 and 34: IBM published CPU expected changes
Page 35 and 36: Rebind all packages/plans Multi-ro
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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