DSNB796I   CASTOUTS PAGES CASTOUT = c1 UNLOCK CASTOUT = c2 READ CASTOUT CLASS = c3 READ CASTOUT STATISTICS = c4 READ DIRECTORY INFO = c5

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

DSNB778I and DSNB796I: Castout statistics

If the DISPLAY GROUPBUFFERPOOL command included the MDETAIL option, the output includes group buffer pool statistics for castouts, checkpoints, and rebuild operations.

DSNB778I - CASTOUT THRESHOLDS DETECTED
             FOR CLASSES                               = t1
             FOR GROUP BUFFER POOL                     = t2
           GBP CHECKPOINTS TRIGGERED                   = k1
           PARTICIPATION IN REBUILD                    = k2
DSNB796I - CASTOUTS
             PAGES CASTOUT                             = c1
             UNLOCK CASTOUT                            = c2
             READ CASTOUT CLASS                        = c3
             READ CASTOUT STATISTICS                   = c4
             READ DIRECTORY INFO                       = c5

t1

The number of times that the class castout threshold was detected.

t2

The number of times that the group buffer pool castout threshold was detected.

k1

The number of group buffer pool checkpoints that were triggered.

k2

The number of times that this member participated in a rebuild of the group buffer pool structure.

c1

That number of pages that were cast out.

c2

The number of requests to unlock a page for castout.

c3

The number of requests to determine which pages, from a particular page set or partition, must be cast out because they are cached as changed pages. This request is issued either by the page set or partition castout owner, or, when the group buffer pool castout threshold is reached by the group buffer pool structure owner.

c4

The number of coupling facility requests to cast out statistics.

c5

The number of requests to read directory information. These requests are made during group buffer pool checkpoints.