Group Buffer Pool

These group buffer pool metrics are reported for each monitored DB2 subsystem.

Page Data Reads: Displays the number of pages that are read from the group buffer pool during the last polling interval.
Page Empty Reads: Displays the number of times a read was attempted from the group buffer pool where the requested data was not found in the pool during the last polling interval.
Page Read Efficiency: Displays the ratio of read requests where data was returned to total read requests during the last polling interval. A low hit ratio indicates that the average time that a page resides in the group buffer pool is too short.
Write Failures: Displays the number of coupling facility write requests that could not complete because of a lack of coupling facility storage resources during the last polling interval.