Changing the number of OLDS buffers

You must change BUFNO by changing the OLDSDEF specification for BUFNO in the LOGGER section of the DFSDFxxx member in IMS.PROCLIB to change the number of OLDS buffers.

When you modify BUFNO, you should consider also modifying the region size for the VSM common storage area (CSA). The amount of storage fixed for OLDS buffers is [BUFNO x BUFFERSIZE].

WADS space is also affected by BUFNO.

To change the number of OLDS buffers:

Procedure

  1. Shut down IMS.
  2. Change the OLDSDEF specification for BUFNO.
  3. Verify CSA size.
  4. Verify WADS space allocation.
  5. Restart IMS.