Date: Tue, 26 Jul 2016 12:19:46 -0400
From: Bruce Momjian <bruce@momjian.us>
To: Jerry Sievers <gsievers19@comcast.net>
Cc: Stephen Frost <sfrost@snowman.net>, pgsql-admin@postgresql.org
Subject: Re: Pg-Upgrade standbys via rsync... and avoid sending
 UNlogged data?
Message-ID: <20160726161946.GA3511@momjian.us>
References: <86d1m5b6bi.fsf@jerry.enova.com>
 <20160725163700.GZ4028@tamriel.snowman.net>
 <20160725164329.GA4028@tamriel.snowman.net>
 <86eg6hr58q.fsf@jerry.enova.com>
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On Mon, Jul 25, 2016 at 12:34:45PM -0500, Jerry Sievers wrote:
> Stephen Frost <sfrost@snowman.net> writes:
> 
> > * Stephen Frost (sfrost@snowman.net) wrote:
> >
> >> > I have among others, a 5TB system  w/about 40G of unlogged data.
> >> 
> >> Honestly, sending an extra 40G out of 5TB (we're talking less than 1%
> >> here...) might be worth it to keep the process simple.
> >
> > Of course, I realize right after sending this that you aren't sending
> > the 5TB. :)
> 
> Roger that!  Really, the hard link pg-upgrade option and rsync method
> for standbys is pure beauty :-)
> 
> We have only the post-analyze and this unlogged data  problem to deal
> with. 
> 
> The warehouse is our only system with any substantial amount of unlogged
> data.
> 
> Reducing post-analyze delay was solved by me here with our groovy
> threaded AnalyzMaTron.  I can get a >5TB system done in about 45 minutes
> w/20 threads.

The only thing I can suggest is to document this limitation, if people
think it is worth it.

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

+ As you are, so once was I. As I am, so you will be. +
+                     Ancient Roman grave inscription +


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