Defining the VSAM buffer pools

Use the CICS® VR VSAM buffer pools secondary window to tune your CICS VR run by changing the number of buffers in the VSAM buffer pools.

If you selected VSAM buffer pools from the CICS VR forward recovery secondary window, shown in Entering recovery parameters, the CICS VR VSAM buffer pools secondary window is displayed.

Figure 1. VSAM buffer pools secondary window

                          CICSVR VSAM buffer pools         Row 1 to 10 of 11

 For LSR, enable or disable Automatic LSR buffers.  If disable, specify the
 number of LSR buffers or leave all fields blank for NSR.  Then press Enter.

   Automatic LSR buffers ===> YES

   Number of buffers   Pool size
   ________            B512
   ________            B1K
   ________            B2K
   ________            B4K
   ________            B8K
   ________            B12K
   ________            B16K
   ________            B20K
   ________            B24K
   ________            B28K

 Command ===> __________________________________________________________________
  F1=Help     F5=GetDef   F6=SaveDef   F7=Bkwd     F8=Fwd     F10=AutoNO    
 F11=AutoYES F12=Cancel

When you first enter this secondary window, the CICS VR default values are displayed. Press F5 to obtain the default values from the RCDS. Press F6 to save the currently displayed values; the CICS VR Default update verification secondary window opens. Press F10 if you do not want to use the automatic calculation of LSR buffers option; press F11 to use this option.

Recommendation: For more efficient recovery jobs, use automatic LSR buffers. For more detailed information about automatic LSR buffers, see BLDVRP: Build the VSAM resource poolCICS VR Implementation Guide and Reference.

For detailed help information about any of these fields, move the cursor to the field and press F1.