Hi all,I got the 10053 trace file, the base statistical infor are same. However, the access ps_job table are different.
BASE STATISTICAL INFORMATION *********************** Table Stats:: Table: PS_JOB Alias: J2 #Rows: 336843 #Blks: 22604 AvgRowLen: 463.00 Index Stats:: Index: PS0JOB Col#: 5 1 2 163 164LVLS: 2 #LB: 1910 #DK: 336843 LB/K: 1.00 DB/K: 1.00 CLUF: 309626.00
Index: PS1JOB Col#: 6 1 2 163 164LVLS: 2 #LB: 2169 #DK: 336843 LB/K: 1.00 DB/K: 1.00 CLUF: 314564.00
Index: PS2JOB Col#: 7 1 2 163 164LVLS: 2 #LB: 1993 #DK: 336843 LB/K: 1.00 DB/K: 1.00 CLUF: 314222.00
Index: PS3JOB Col#: 8 1 2 163 164LVLS: 2 #LB: 1870 #DK: 336843 LB/K: 1.00 DB/K: 1.00 CLUF: 310110.00
Index: PS4JOB Col#: 9 1 2 163 164LVLS: 2 #LB: 1826 #DK: 336843 LB/K: 1.00 DB/K: 1.00 CLUF: 309689.00
Index: PSAJOB Col#: 1 2 163 164 6LVLS: 2 #LB: 2112 #DK: 336843 LB/K: 1.00 DB/K: 1.00 CLUF: 309626.00
Index: PSBJOB Col#: 1 2 163 164 15 12 11LVLS: 2 #LB: 2021 #DK: 336843 LB/K: 1.00 DB/K: 1.00 CLUF: 309626.00
Index: PSCJOB Col#: 142 LVLS: 2 #LB: 688 #DK: 964 LB/K: 1.00 DB/K: 63.00 CLUF: 61489.00 Index: PS_JOB Col#: 1 2 163 164LVLS: 2 #LB: 1660 #DK: 336843 LB/K: 1.00 DB/K: 1.00 CLUF: 309626.00
Access path analysis for PS_JOB *************************************** SINGLE TABLE ACCESS PATH Single Table Cardinality Estimation for PS_JOB[J2] Table: PS_JOB Alias: J2Card: Original: 336843.000000 Rounded: 34 Computed: 33.68 Non Adjusted: 33.68
Access Path: TableScan Cost: 6152.01 Resp: 6152.01 Degree: 0 Cost_io: 6124.00 Cost_cpu: 235247591 Resp_io: 6124.00 Resp_cpu: 235247591 Access Path: index (index (FFS)) Index: PS0JOB resc_io: 519.00 resc_cpu: 71033682 ix_sel: 0.000000 ix_sel_with_filters: 1.000000 Access Path: index (FFS) Cost: 527.46 Resp: 527.46 Degree: 1 Cost_io: 519.00 Cost_cpu: 71033682 Resp_io: 519.00 Resp_cpu: 71033682 Access Path: index (index (FFS)) Index: PS1JOB Bad one had the newdensity which was not in the good trace. Access path analysis for PS_JOB *************************************** SINGLE TABLE ACCESS PATH Single Table Cardinality Estimation for PS_JOB[J2] Column (#1):NewDensity:0.000026, OldDensity:0.000036 BktCnt:254, PopBktCnt:0, PopValCnt:0, NDV:38130
Column (#2):NewDensity:0.000192, OldDensity:0.000002 BktCnt:5195, PopBktCnt:5195, PopValCnt:7, NDV:7
Table: PS_JOB Alias: J2Card: Original: 336843.000000 Rounded: 1 Computed: 1.26 Non Adjusted: 1.26
Access Path: TableScan Cost: 6151.99 Resp: 6151.99 Degree: 0 Cost_io: 6124.00 Cost_cpu: 235078951 Resp_io: 6124.00 Resp_cpu: 235078951 Access Path: index (index (FFS)) Index: PS0JOB resc_io: 519.00 resc_cpu: 70865702 ix_sel: 0.000000 ix_sel_with_filters: 1.000000 Access Path: index (FFS) Cost: 527.44 Resp: 527.44 Degree: 1 Cost_io: 519.00 Cost_cpu: 70865702 Resp_io: 519.00 Resp_cpu: 70865702 -- //www.freelists.org/webpage/oracle-l