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Re: Standbys, txid_current_snapshot, wraparound

From: Marko Kreen <markokr(at)gmail(dot)com>
To: Simon Riggs <simon(at)2ndQuadrant(dot)com>
Cc: Daniel Farina <daniel(at)heroku(dot)com>,pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>,Andrey Velikoredchanin <uncleandyv(at)gmail(dot)com>
Subject: Re: Standbys, txid_current_snapshot, wraparound
Date: 2012-03-29 14:04:33
Message-ID: (view raw or whole thread)
Lists: pgsql-hackers
On Thu, Mar 29, 2012 at 02:46:23PM +0100, Simon Riggs wrote:
> On Thu, Mar 29, 2012 at 12:06 PM, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
> > Patch coming in a few hours.
> This is more straightforward than I was thinking. We just need to
> initialise XLogCtl at the right place.

Looks good to me.  That should fix the problem with standbys then.

Next question: how can flipping archive_mode on and off,
with restarts, near wraparound point, break epoch on master?

Any ideas?

Could WAL playback from backend with different archive_mode setting
cause it somehow?


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