VSAM Performance Enhancement › VPE Operation › VPE Rules Table

VPE Rules Table

Typically, the Storage Administrator maintains the VPE Rules Table. The rules table statements are keyed into a simple text file using any text editor, such as the SPF Editor (Option 2). The statements in this text file are converted to the internal form VPE uses by running the VPERULB program. When VPE is activated during system startup, the internal form of the VPE Rules Table is loaded into Common System Area (CSA) memory, always above the 16 Mb line when it is available.

The VPE Rules Table is deleted from CSA when VPE is uninstalled, so you must run the VPERULB program each time you install VPE. The best way to accomplish this is to include the VPERULB step in your startup PROC for VPE and CA Compress.

Note: Running the VPERULB is necessary only when you use the VPE Rules Table. If you only use the VPE Control DD Statements, it is not necessary to run this program.