Wrong path access table ESKN on transaction COHV

Question

Hallo.
When I execute transaction COHV the performance are bad.
I investigated and I found the statement:
for example
select * from eskn where mandt = '100' and aufnr = '1171132' and   loekz = ' ';
very long beacause it doesn't use the index
ESKN~G
with column
MANDT, AUFNR
If I execute the statement:
select * from eskn where aufnr = '1171132' and   loekz = ' ';
index is used and statement are fast
So it seems that the MANDT brings the problem.
I have Oracle 11.2.0.2 and upgraded two months ago from Oracle 10.2.0.4
When I was in Oracle 10.2.0.4 there wasn't the problem.
Could you help me?
Thanks.
Mario

Answer 1

I obtain:
SQL> select distinct(AUFNR) from sapsr3.ESKN;
AUFNR
SQL>
so no value it seems.
I collect statistics using brtools:
Detail log:                    cegxzqwd.sta
BR0801I BRCONNECT 7.20 (16)
BR0805I Start of BRCONNECT processing: cegxzqwd.sta 2011-10-06 16.49.59
BR0484I BRCONNECT log file: F:\oracle\TES\sapcheck\cegxzqwd.sta
BR0101I Parameters
Name                           Value
oracle_sid                     TES
oracle_home                    F:\oracle\TES\11202
oracle_profile                 F:\oracle\TES\11202\database\initTES.ora
sapdata_home                   G:\oracle\TES
sap_profile                    F:\oracle\TES\11202\database\initTES.sap
system_info                    SAPServiceTES STESVV01 Windows 5.2 Build 3790 Service Pack 2 AMD64
oracle_info                    TES 11.2.0.2.0 8192 552 3816993493 STESVV01 UTF8 UTF8 773218351
sap_info                       700 SAPSR3 0002LK0003TES0011Z01163691220013NetWeaver_ORA
make_info                      NTAMD64 OCI_10201_SHARE Aug  2 2011
command_line                   brconnect -u / -c -f stats -o SAPSR3 -t ESKN -e null -m E -s P3 -f allsel,collect,method,sample,keep
stats_owner                    SAPSR3
stats_table                    ESKN
stats_dbms_stats               ALL:R:0
stats_method                   E
stats_sample_size              P3
stats_change_threshold         50
stats_parallel_degree          1
BR0280I BRCONNECT time stamp: 2011-10-06 16.50.02
BR0813I Schema owner found in database TES: SAPSR3*
BR0280I BRCONNECT time stamp: 2011-10-06 16.50.02
BR0807I Name of database instance: TES
BR0808I BRCONNECT action ID: cegxzqwd
BR0809I BRCONNECT function ID: sta
BR0810I BRCONNECT function: stats
BR0811I Owner of database schema for processing: SAPSR3
BR0812I Database objects for processing: ESKN
BR0851I Number of tables with missing statistics: 1
Owner SAPSR3: 1
ESKN
BR0852I Number of tables to delete statistics: 0
BR0854I Number of tables to collect statistics without checking: 1
Owner SAPSR3: 1
ESKN
BR0855I Number of indexes with missing statistics: 2
Owner SAPSR3: 2
ESKN0       ESKNG
BR0856I Number of indexes to delete statistics: 0
BR0857I Number of indexes to collect statistics: 0
BR0853I Number of tables to check (and collect if needed) statistics: 0
BR0862I Force option with value 'allsel,collect,keep,method,sample' set
BR0126I Unattended mode active - no operator confirmation required
BR0280I BRCONNECT time stamp: 2011-10-06 16.50.02
BR0877I Checking and collecting table and index statistics...
BR0280I BRCONNECT time stamp: 2011-10-06 16.50.02
BR0881I Collecting statistics for table SAPSR3.ESKN with method/sample E/P3 ...
BR0280I BRCONNECT time stamp: 2011-10-06 16.50.19
BR0884I Statistics collected for table: SAPSR3.ESKN, rows old/new: -1/4881767
BR0280I BRCONNECT time stamp: 2011-10-06 16.50.19
BR0850I 1 of 1 object processed - 0.002 of 0.002 units done
BR0204I Percentage done: 100.00%, estimated end time: 16:50
BR0001I **************************************************
BR0280I BRCONNECT time stamp: 2011-10-06 16.50.19
BR0879I Statistics checked for 0 tables
BR0878I Number of tables selected to collect statistics after check: 0
BR0880I Statistics collected for 1/0 tables/indexes
BR0894I Tables with the longest duration of collecting statistics for owner SAPSR3
  Pos. Owner    Table                Duration   Rows/old    Rows/new  Meth./Samp.   Space[KB]  Used[KB:%]    Data[KB:%]    Lobs   Space[KB]   Used[KB:%]    Data[KB:%]
                                       [m:s]
    1  SAPSR3   ESKN                    0:17          -1     4881767      E/P3            -1   1113112:100    901029:81       0          0          0:0           0:0
BR0900I Usage of space allocated in tablespaces for analyzed tables and indexes
Pos. Tablespace     Tables  Analy.  Space[KB]   Used[KB:%]     Data[KB:%]  Indexes  Valid.  Space[KB]   Used[KB:%]     Data[KB:%]    Lobs   Proc.  Space[KB]   Used[KB:%]     Data[KB:%]
  1  PSAPSR3            -1      1         -1    1113112:100     901029:81       -1      0          0          0:0            0:0       -1      0          0          0:0            0:0
BR0806I End of BRCONNECT processing: cegxzqwd.sta 2011-10-06 16.50.19
BR0280I BRCONNECT time stamp: 2011-10-06 16.50.19
BR0802I BRCONNECT completed successfully