Global parameters for SPACAQTY
The following table lists the global parameters that affect SPACAQTY.
SPACAQTY global parameters
Parameter | Purpose |
|---|---|
DS_ASST_CNT | Specifies the number of DB updates to occur before issuing ENDREQ to flush the buffers to DASD Valid values are 1 through 10000; default is DS_ASST_CNT=500. |
DS_ASST_DB | Specifies the data set name of the Data Set Size Assist DB file DS_ASST_DB=NONE prevents the Data Set Size Assist feature from starting. |
DS_ASST_RLS | Specifies to run DS Size Assist in non-RLS mode under the following conditions:
Valid values are YES | NO | Y | N; default is DS_ASST_RLS=Y. |
DS_ASST_SLO | Specifies the number of slots to maintain in each tracked data set record Each slot records the allocation amounts of a data set, which when combined, provide an allocation history of the data set. When changing this value after records exist in the Data Set Size Assist DB, the Data Set Size Assist feature automatically adjusts a data set record in the DB, but only when a data set goes through one of the collection points (allocation, extend, partial release, uncatalog, migrate and GDG roll-off). If you want to change all data set records at once, you can run the Data Set Size Assist Maintenance Utility. Refer to the distributed JCLDSAAS sample member in the BBSAMP PARMLIB for instructions on performing this utility. Valid values are 2 through 20; default is DS_ASST_SLO=10. Note: Raising the DS_ASST_SLO value causes record length increases for any pre-existing data set record when the record is next updated, can cause CI/CA splits to occur in the DB. A better solution might be to run sample JCLDSAAS, followed by a reorganization (see sample JCLDSARO). |