DSNB798I LAST GROUP BUFFER POOL CHECKPOINT timestamp GBP CHECKPOINT RECOVERY LRSN = lrsn STRUCTURE OWNER = member-name

If Db2 determines, by successfully querying the MVS CFRM policy, that the group buffer pool is allocated, the DISPLAY GROUPBUFFERPOOL command output includes checkpoint information

DSNB798I - LAST GROUP BUFFER POOL CHECKPOINT
                                          timestamp
             GBP CHECKPOINT RECOVERY LRSN              = lrsn
             STRUCTURE OWNER                           = member-name

timestamp

The date and time of the last group buffer pool checkpoint.

lrsn

The log record sequence number (LRSN) that was recorded by the last group buffer pool checkpoint.

member-name

The name of the member that is the structure owner for the group buffer pool.

A value of UNKNOWN means that Db2 is not able to determine which member is the structure owner for the group buffer pool. This condition occurs only in error situations. See the message that is associated with that error.

The structure owner has the following responsibilities:

• Issue group buffer pool checkpoints.
• Detect the group buffer pool castout threshold (the GBPOOLT value) and initiate castout if this threshold is reached. (The structure owner initiates castout by notifying the page set or partition castout owners.)
• Coordinate the damage assessment process if the group buffer pool fails.
• Coordinate the rebuild process for the group buffer pool.