DSNB355I csect-name GROUP BUFFER POOL gbp-name RECOVERY LRSN VALUES MIGHT CAUSE A DELAY IN GRECP RECOVERY. PAGE LEVEL = minimum-page-lrsn MEMBER LEVEL = minimum-member-lrsn PAGE LEVEL IN LOCAL TIMESTAMP = minimum-page-timestamp MEMBER LEVEL IN LOCAL TIMESTAMP = minimum-member-timestamp

Explanation

This message is issued at a group buffer pool checkpoint, if the minimum page LRSN or the minimum member LRSN that are used in recovery from the group buffer pool recovery pending (GRECP) state meet either of the following conditions:

  • The minimum page LRSN is older than the time when the third-to-last group buffer pool checkpoint was taken.

    For example, suppose that group buffer pool checkpoints are taken at times T1, T2, T3, and T4. At time T4, if Db2 detects that the time of the minimum page LRSN is earlier than time T1, this message is issued.

  • The minimum member LRSN is invalid. The value is X'FFFFFFFFFFFF' for a six-byte LRSN, or X'FFFFFFFFFFFFFFFFFFFF' for a ten-byte LRSN.
csect-name
The name of the control section that issued the message.
gbp-name
The name of the group buffer pool.
minimum-page-lrsn
The minimum page LRSN. This value is the oldest changed page clean-to-dirty LRSN that was recorded at the time of the last group buffer pool checkpoint.
minimum-member-lrsn
The minimum member LRSN. This value is the minimum member-level, write-pending LRSN that was recorded at the last group buffer pool checkpoint. Db2 records a restart/redo LRSN for each member of the data sharing group at a group buffer pool checkpoint. The minimum member LRSN reflects the minimum value across all members. If the group buffer pool fails, Db2 does a merge log scan to recover the page sets and partitions that are in GRECP status. Db2 uses each member’s restart/redo LRSN in conjunction with the minimum page LRSN to determine the starting point for the merge log scan.
minimum-page-timestamp
The local timestamp of the minimum page-level LRSN.
minimum-member-timestamp
The local timestamp of the minimum member-level LRSN. If the minimum member-level LRSN is invalid, the string ********** is displayed.

The local timestamps are in the following format:

 hh:mm:ss month dd, yyyy
hh:mm:ss
The time portion of the timestamp, expressed as hours, minutes, and seconds.
month
An alphanumeric abbreviation for the month. Possible values are:
Month month value in the local timestamp
January JAN
February FEB
March MAR
April APR
May MAY
June JUN
July JUL
August AUG
September SEP
October OCT
November NOV
December DEC
dd
The day of the month.
yyyy
The year.

System action

Processing continues. This message is displayed on the console until either of the following situations occurs:
  • The minimum page LRSN is newer than the third-to-last group buffer pool checkpoint, and the minimum member LRSN is valid.
  • The member that issued the message disconnects from the group buffer pool.

User response

If this message is displayed after all Db2 data sharing members are running normally or have shut down normally, contact IBM® Support for assistance.

If this message is displayed after some Db2 data sharing members shut down abnormally, restart those Db2 members.

While the condition that caused this message persists, applications can continue to run without any impact. However, this condition lengthens the time that is required for recovery from GRECP status.

This message is issued intermittently when the condition that causes it occurs. If DSNB355I messages continue to be displayed, contact IBM Support for assistance.

Collect the following diagnostic items:
  • Dump of the group buffer pool.
  • Console output from the system on which the job was run, and a listing of the SYSLOG data set for the period of time that spans the failure.