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Re: 9.3: summary of corruption detection / checksums / CRCs discussion

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Re: 9.3: summary of corruption detection / checksums / CRCs discussion
Date: 2012-04-25 01:31:39
Message-ID: 4F9753FB.2010006@agliodbs.com (view raw or flat)
Thread:
Lists: pgsql-hackers
On 4/21/12 2:40 PM, Jeff Davis wrote:
> If we do use WAL for hint bit updates, that has an impact on Hot
> Standby, because HS can't write WAL. So, it would seem that HS could not
> set hint bits.

If we're WAL-logging hint bits, then the standby would be receiving
them, so it doesn't *need* to write them.

However, I suspect that WAL-logging hint bits would be prohibitively
expensive.

-- 
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com

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