Sample RUNSTATS control statements

Use the sample control statements as models for developing your own RUNSTATS control statements.

Example 1: Updating catalog statistics for a table space while allowing changes

The following control statement specifies that the RUNSTATS utility is to update the catalog with statistics for table space DSN8D81A.DSN8S12E and all of its associated tables and indexes. When updating the table statistics, RUNSTATS is to sample 25% of the rows. Although SHRLEVEL CHANGE is not specified, by default Db2 permits other processes to make changes to the table space while the RUNSTATS utility is executing.

//STEP1    EXEC DSNUPROC,UID='IUJQU225.RUNSTA',TIME=1440,
//         UTPROC='',
//         SYSTEM='DSN'
//UTPRINT  DD  SYSOUT=*
//SYSIN    DD *
RUNSTATS TABLESPACE DSN8D12A.DSN8S12E
   TABLE(ALL) SAMPLE 25
    INDEX(ALL)

Example 2: Updating index statistics

The following control statement specifies that RUNSTATS is to update the catalog statistics for index DSN8810.XEMPL1.

RUNSTATS INDEX (DSN8C10.XEMPL1)

Example 3: Updating index statistics while prohibiting updates

The following control statement specifies that RUNSTATS is to update the catalog statistics for indexes XEMPL1 and XEMPL2. Db2 does not permit other processes to change the table space that is associated with XEMPL1 and XEMPL2 (table space DSN8S12E) while this utility is executing. This restricted access is the default behavior.

RUNSTATS INDEX (DSN8C10.XEMPL1,DSN8C10.XEMPL2)

Example 4: Updating statistics for columns in several tables

The following control statement specifies that RUNSTATS is to update the catalog statistics for the following columns in table space DSN8D12P.DSN8S12C:

All columns in the TCONA and TOPTVAL tables
The LINENO and DSPLINE columns in the TDSPTXT table

RUNSTATS TABLESPACE(DSN8D12P.DSN8S12C) 
         TABLE (TCONA)
         TABLE (TOPTVAL) COLUMN(ALL)
         TABLE (TDSPTXT) COLUMN(LINENO,DSPLINE)

Example 5: Updating all statistics for a table space

The following control statement specifies that RUNSTATS is to update all catalog statistics (table space, tables, columns, and indexes) for table space DSN8D81P.DSN8S81C.

RUNSTATS TABLESPACE(DSN8D12P.DSN8S12C) TABLE INDEX

Example 6: Updating statistics that are used for access path selection and generating a report

The following control statement specifies that RUNSTATS is to update the catalog with only the statistics that are collected for access path selection. The utility is to report all statistics for the table space and route the report to SYSPRINT.

RUNSTATS TABLESPACE DSN8D12A.DSN8S12E
  REPORT YES
  UPDATE ACCESSPATH

Example 7: Updating all statistics and generating a report

The following control statement specifies that RUNSTATS is to update the catalog with all statistics (access path and space) for table space DSN8D81A.DSN8S81E. The utility is also to report the collected statistics and route the report to SYSPRINT.

RUNSTATS TABLESPACE DSN8D12A.DSN8S12E
  REPORT YES
  UPDATE ALL

Example 8: Reporting statistics without updating the catalog

The following control statement specifies that RUNSTATS is to collect statistics for table space DSN8D81A.DSN8S81E and route the report to SYSPRINT. The utility is not to update the catalog with the collected statistics.

RUNSTATS TABLESPACE DSN8D12A.DSN8S12E
  REPORT YES
  UPDATE NONE

Example 9: Updating statistics for a partition

The following control statement specifies that RUNSTATS is to update the statistics for the first partition of table space DSN8D81A.DSN8S81E and the first partition of the DSN8810.XEMP1 index.

RUNSTATS TABLESPACE DSN8D12A.DSN8S12E PART 1 INDEX(DSN8C10.XEMP1 PART 1)

Example 10: Updating catalog and history tables and reporting all statistics

The following control statement specifies that RUNSTATS is to update the catalog tables and history catalog tables with all statistics for table space DB0E0101.TL0E0101 (including related indexes and columns). The utility is to report the collected statistics and route the statistics to SYSPRINT.

RUNSTATS TABLESPACE DBOE0101.TLOE0101 
   INDEX                        
   TABLE                      
   REPORT YES                   
   UPDATE ALL                   
   HISTORY ALL

Example 11: Updating statistics on frequently occurring values

Assume that the SYSADM.IXNP1 index is defined on four columns: NP1, NP2, NP3, and NP4. The following control statement specifies that RUNSTATS is to update the statistics for index SYSADM.IXNPI.

The RUNSTATS utility collects cardinality statistics for column NP1, column set NP1 and NP2, and column set NP1, NP2, and NP3, and column set NP1, NP2, NP3, and NP4. The FREQVAL option and its associated parameters indicate that RUNSTATS is also to collect the 5 most frequently occurring values on column NP1 (the first key column of the index), and the 10 most frequently occurring values on the column set NP1 and NP2 (the first two key columns of the index). The utility is to report the collected statistics and route the statistics to SYSPRINT.

RUNSTATS INDEX (SYSADM.IXNPI) 
           FREQVAL NUMCOLS 1 COUNT 5                        
           FREQVAL NUMCOLS 2 COUNT 10           
           REPORT YES

Example 12: Updating distribution statistics for a group of specified columns in a table

The following control statement specifies that RUNSTATS is to update statistics for the columns EMPLEVEL, EMPGRADE, and EMPSALARY in table DSN8810.DEPT (in table space DSN8D81A.DSN8S81E). The statement uses the COLGROUP keyword to group these columns. RUNSTATS is to collect the cardinality of this column group and store the cardinality in the SYSCOLDIST catalog table.

RUNSTATS TABLESPACE DSN8D81A.DSN8S81E
TABLE(DSN8810.DEPT)
COLGROUP (EMPLEVEL,EMPGRADE,EMPSALARY)

Example 13: Updating distribution statistics for specific columns and retrieving the most frequently occurring values

The following control statement specifies that RUNSTATS is to update statistics for the columns EMPLEVEL, EMPGRADE, and EMPSALARY in table DSN8810.DEPT. The FREQVAL and COUNT options indicate that RUNSTATS is to collect the 10 most frequently occurring values for each column. The values are to be stored in the SYSCOLDIST and SYSCOLDISTSTATS catalog tables.

RUNSTATS TABLESPACE DSN8D81A.DSN8S81E
TABLE(DSN8810.DEPT)
COLGROUP(EMPLEVEL,EMPGRADE,EMPSALARY) FREQVAL COUNT 10

Example 14: Updating distribution statistics for specific columns in a table and retrieving the least frequently occurring values

The following control statement specifies that RUNSTATS is to update statistics for the columns EMPLEVEL, EMPGRADE, and EMPSALARY in table DSN8810.DEPT. The FREQVAL and COUNT options indicate that RUNSTATS is to collect the 15 least frequently occurring values for each column. The values are to be stored in the SYSCOLDIST and SYSCOLDISTSTATS catalog tables.

RUNSTATS TABLESPACE DSN8D81A.DSN8S81E
TABLE(DSN8810.DEPT)
COLGROUP(EMPLEVEL,EMPGRADE,EMPSALARY) FREQVAL COUNT 15 LEAST

Example 15: Updating distribution statistics for specific columns in a table space and retrieving the most and least frequently occurring values

The following control statement specifies that RUNSTATS is to update statistics for the columns EMPLEVEL, EMPGRADE, and EMPSALARY in table DSN8810.DEPT. The FREQVAL and COUNT options indicate that RUNSTATS is to collect the 10 most frequently occurring values for each column and the 10 least frequently occurring values for each column. The values are to be stored in the SYSCOLDIST and SYSCOLDISTSTATS catalog tables.

RUNSTATS TABLESPACE DSN8D81A.DSN8S81E
TABLE(DSN8810.DEPT)
COLGROUP(EMPLEVEL,EMPGRADE,EMPSALARY) FREQVAL COUNT 10 BOTH

Example 16: Updating statistics for an index and retrieving the most and least frequently occurring values

The following control statement specifies that RUNSTATS is to collect the 10 most frequently occurring values and the 10 least frequently occurring values for the first key column of index ADMF001.IXMA0101. By default, the utility collects all the distinct values in all the key column combinations. A set of messages is sent to SYSPRINT and all collected statistics are updated in the catalog.

RUNSTATS INDEX(ADMF001.IXMA0101)
FREQVAL NUMCOLS 1 COUNT 10 BOTH
REPORT YES UPDATE ALL

Example 17: Invalidating statements in the dynamic statement cache for a table space without generating report statistics.

The following control statement specifies that RUNSTATS is to invalidate statements in the dynamic statement cache for table space DSN8D81A.DSN8S81E. However, RUNSTATS is not to collect or report statistics or update the catalog.

RUNSTATS TABLESPACE DSN8D81A.DSN8S81E
REPORT NO
UPDATE NONE

Example 18: RUNSTATS HISTOGRAM job statement.

The following control statement specifies that RUNSTATS is to gather histogram statistics for the specified key columns. Histogram statistics can only be collected on the prefix columns with the same order.

RUNSTATS TABLESPACE RVTDB01.RVTTS01
INDEX ALL
HISTOGRAM NUMCOLS 2   NUMQUANTILES 5
SHRLEVEL(CHANGE)
UPDATE ALL
REPORT YES