Increasing Region Size

EREP can use two different sorting algorithms for its reports; the faster one requires additional storage equal to TABSIZE.

EREP always tries to obtain the additional storage, and uses the faster sort routine if the storage is available.

You can significantly improve EREP’s performance, if you increase your region size by the value of TABSIZE over the requirements outlined in Table 1.

Several conditions can require you to increase the region size when running EREP. Table 1 shows these conditions and recommended amounts of region increase for each.

Table 1. MVS Region Size Increases for EREP
INFLUENCING FACTOR	INCREASE REGION SIZE BY
You are using the TABSIZE parameter	The specified value of TABSIZE minus 4KB
You are using EREP control statements	The specified or default value of TABSIZE
You are requesting the system exception report series	6 times the specified or default value of TABSIZE
You are using any of the following selection parameters: CPU CPUCUA CUA DEV DEVSER LIA/LIBADR MOD SYMCDE VOLID	4KB for any or all
You are requesting detail edit reports (PRINT=PT, PS or AL)	4KB for each processor

Use the REGION parameter on either the JOB or EXEC statement to increase the virtual storage (region) size. Refer to the JCL manual for your MVS system for information on how to change the region size.