Re: Shutting down a warm standby database in
Tom Lane <tgl@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Stephen Harris <lists@spuddy.org>
Cc: Bruce Momjian <bruce@momjian.us>, pgsql-hackers@postgresql.org
Date: 2006-11-30T21:36:54Z
Lists: pgsql-hackers, pgsql-general
Stephen Harris <lists@spuddy.org> writes: > On Thu, Nov 30, 2006 at 03:59:15PM -0500, Tom Lane wrote: >> Actually I was misremembering that: the frequency of recovery >> checkpoints is time-based, and for a slave that's in sync with its >> master, they should occur about as often as checkpoints on the master. >> So the amount of log to be replayed should be comparable to what the >> master would have to replay if it crashed. > As a test, I started a recover, recovered 11 archive logs > (000000010000000000000035 to 00000001000000000000003F), some may have had > activity; I not sure. I then waited 10 minutes after the last log file > had been replayed. Then I did a fast shutdown. Starting the standby > database again required it going back to 000000010000000000000035 again. That case is not what I described --- you weren't tracking a live master that's generating checkpoints. regards, tom lane