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Re: Heavy write activity on first vacuum of freshTOAST data

From: "Kevin Grittner" <Kevin(dot)Grittner(at)wicourts(dot)gov>
To: "Simon Riggs" <simon(at)2ndquadrant(dot)com>
Cc: <pgsql-performance(at)postgresql(dot)org>
Subject: Re: Heavy write activity on first vacuum of freshTOAST data
Date: 2007-12-13 21:19:34
Message-ID: 47614D86.EE98.0025.0@wicourts.gov (view raw or flat)
Thread:
Lists: pgsql-performance
>>> On Thu, Dec 13, 2007 at 12:12 PM, in message
<1197569564(dot)4255(dot)1855(dot)camel(at)ebony(dot)site>, Simon Riggs <simon(at)2ndquadrant(dot)com>
wrote: 
> On Thu, 2007-12-13 at 11:46 -0600, Kevin Grittner wrote:
>> If the hint bit changes are written to the WAL ...
> 
> They're not.
 
So one would expect a write-intensive initial vacuum after a
PITR-style recovery?
 
What impact would lack of the hint bits have until a vacuum?
 
-Kevin
 



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