On 17.04.2012 09:50, Kyotaro HORIGUCHI wrote:
This is new version of the patch. I replaced GetStandbyFlushRecPtr with GetXLogReplayRecPtr to check progress of checkpoint following Fujii's sugestion.
The reason we haven't historically obeyed checkpoint_segments during recovery is that it slows down the recovery unnecessarily if you're restoring from a backup and you replay, say, one week's worth of WAL files. If for example you have checkpoint_segments=10 and checkpoint_timeout='15 mins' in the server that generated the WAL, you would be constantly performing a restartpoint if you trigger one every 10 segments.
You could argue that you should obey checkpoint_segments in a standby server that's caught up with the master, but AFAICS the patch doesn't try to detect that.
-- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
