Using the Database-Buffer-Pool report

The primary usefulness of the Database-Buffer-Pool report is to calculate how many I/O operations were required to read to or write from the OSAM buffer pool.

You might want to increase buffer pool size to see if you can decrease the number of I/O operations. Or, if the number is increasing over time, you might need to reorganize your database.

To calculate the number of I/O operations required to read to or write from the buffer pool, use the following formula:

Total I/O equals the sum of:

1. Blocks read from the database

   Number of blocks read for OSAM specific requests (Number of Read Requests Issued)

2. Blocks written to the database

   Number of blocks written because of buffer steal processing and purge processing (Number of Blocks Written)