FLUSH BUFFERPOOLS statement
The FLUSH BUFFERPOOLS statement writes the dirty pages from all the local buffer pools for a particular database synchronously to disk.
In Db2® pureScale® environments, the dirty pages in the group buffer pool are also written synchronously to disk.
This statement is not under transaction control.
- To reduce the recovery window of a database in the event of a failure
- To reduce the size of logs written to a backup image before database operations such as online backups
- To minimize the recovery time of a split-mirror database
The statement can be embedded in an application program or issued through the use of dynamic SQL statements. It is an executable statement that can be dynamically prepared.
The privileges held by the authorization ID of the statement must include SQLADM, DBADM, SYSMAINT, SYSCTRL, or SYSADM authority.
- Flushes the dirty pages from all the buffer pools (local and group).
- Dirty pages processing: Only the dirty pages that are in the buffer pools when the statement begins processing are written to disk. Any dirty pages that are added to the buffer pools before the statement finishes processing are not written to disk.
- Syntax alternatives: BUFFERPOOL can be specified in place of BUFFERPOOLS.