Monitoring VSAM buffers

If you are using VSAM, you can monitor buffers using the DB-Monitor reports, the IMS Monitor tool, or an IMS command.

With DB-Monitor reports, a VSAM subpool report is produced for each buffer size you define. The VSAM Buffer Pool report tells the number of buffers in the subpool and their size (in the SUBPOOL BUFFER SIZE and TOTAL BUFFERS IN SUBPOOL fields).

The IMS Monitor is a tool that records data about the performance of your DL/I databases in a batch environment.

Use the type-1 /DISPLAY POOL DBAS command to display processor storage utilization statistics for VSAM database buffer pools.

If you dynamically reconfigure your VSAM shared resource pools using the dynamic database buffer pools function, you can issue the type-2 QUERY POOL TYPE(DBAS) command to obtain information about the buffer pools and to confirm that the dynamic updates are completed as intended.