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Re: I/O on select count(*)

From: "Heikki Linnakangas" <heikki(at)enterprisedb(dot)com>
To: "Decibel!" <decibel(at)decibel(dot)org>
Cc: "Greg Smith" <gsmith(at)gregsmith(dot)com>,<pgsql-performance(at)postgresql(dot)org>
Subject: Re: I/O on select count(*)
Date: 2008-05-26 13:03:17
Message-ID: 483AB515.5050201@enterprisedb.com (view raw or flat)
Thread:
Lists: pgsql-performance
Decibel! wrote:
> Also, Simon and Tom had an idea at PGCon: Don't set hint-bits in the 
> back-end if the page isn't already dirty. 

Or even better: set the hint-bits, but don't dirty the page.

-- 
   Heikki Linnakangas
   EnterpriseDB   http://www.enterprisedb.com

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