Usage

Use this report to see information about activity in VSAM LSR buffer pools.

A buffer pool number can be associated with a VSAM file. This is indicated in the Open Intent field in any reports that show detailed file information. For example, report D04 might show the following:

KEY,DSN,DIR,SEQ,SKP,OUT,NLW,LSR SHRPOOL=1

This indicates the file uses shared buffer pool number 1. Refer to report D09 to examine how effectively the buffer pool was able to reduce the I/O activity for the associated file(s).

For each buffer pool, activity is quantified for each buffer size and type (DATA or INDEX component). The buffer size corresponds to the CI size for the associated file component. VSAM will choose buffers which are at least as large as and closest in size to the CI size.