Re: HS/SR and smart shutdown
Mark Kirkwood <mark.kirkwood@catalyst.net.nz>
From: Mark Kirkwood <mark.kirkwood@catalyst.net.nz>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Robert Haas <robertmhaas@gmail.com>, Josh Berkus <josh@agliodbs.com>, Fujii Masao <masao.fujii@gmail.com>, pgsql-hackers@postgresql.org
Date: 2010-01-21T01:59:00Z
Lists: pgsql-hackers
Tom Lane wrote: > Robert Haas <robertmhaas@gmail.com> writes: > >> On Wed, Jan 20, 2010 at 8:44 PM, Josh Berkus <josh@agliodbs.com> wrote: >> >>> Well, as long as streaming rep is running, you can't do a smart shutdown >>> ... smart shutdown seems to treat the walreciever as a client >>> connection. At the very least, this should be in the documentation. >>> > > >> How hard is it to fix? >> > > I think the first question is do we *want* to fix it, or is it > appropriate behavior? > > If the master shuts down, will the slaves try to fail over to become > masters? When the master restarts, will the slaves automatically > reconnect? If these questions have the wrong answers, shutting down the > master isn't something to be done lightly, and automatically > disconnecting slaves would be a real bad idea. > > Right - surely people who have been using pg_standby etc have discovered this behaviour, so documenting it is fine I would think. regards Mark