DSNB777I ASYNCHRONOUS WRITES CHANGED PAGES = changed-pages-count CLEAN PAGES = clean-pages-count FAILED DUE TO LACK OF STORAGE = failed-writes-count WRITE-AROUND PAGES= write-around-count

Explanation

This message is a section of output from the DISPLAY GROUPBUFFERPOOL command, which is part of message DSNB750I.

DSNB777I: Asynchronous write statistics

If the DISPLAY GROUPBUFFERPOOL command included the MDETAIL option, the output includes asynchronous write and cross-invalidation statistics for the group buffer pool. The term asynchronous means that the coupling facility interaction is done under the execution unit of a Db2 system, such as with a prefetch operation.

DSNB777I -   ASYNCHRONOUS WRITES
               CHANGED PAGES                           = changed-pages-count
               CLEAN PAGES                             = clean-pages-count
             FAILED WRITES DUE TO LACK OF STORAGE      = failed-writes-count
             WRITE-AROUND PAGES                        = write-around-count

changed-pages-count

The number of changed pages that were written asynchronously to the coupling facility.

clean-pages-count

The number of clean pages that were written asynchronously to the coupling facility.

failed-writes-count

The number of coupling facility write requests that were not completed because the group buffer pool did not have enough storage.

write-around-count

The number of changed pages that are written to disk through group-buffer-pool write-around protocol.