CA-L-Serv › Define Managed Files › Buffer Pools › Evaluate Buffer Pool Usage

Evaluate Buffer Pool Usage

To see how well your buffer pools are being used, issue the DISPLAY commands described below.

• Issue the DISPLAY BUFFERPOOL command:

  DISPLAY BUFFERPOOL
  

  In the output, a high number of BFRFND (buffer find) counts relative to BUFRDS (buffer read) counts are desirable for each buffer size.

• Issue the DISPLAY STATISTICS=SERVICE command:

  DISPLAY STATISTICS=SERVICE
  

  In the output, the following service times are desirable:

  • Service times below 40 milliseconds for PUT (write) and DIRGET (direct read) requests.
  • Service times below 10 milliseconds for SEQ GET (sequential read) requests.

Note: The BFRFND, BUFRDS, UIW and NUIW keywords that appear on these CA-L-Serv reports are VSAM terminology. For a full discussion of these terms, see the SMS manual Using Data Sets together with the IBM recommendations on their interpretation.