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