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From: Dave Cramer <pg@fastcrypt.com>
To: Heikki Linnakangas <heikki@enterprisedb.com>
Cc: postgresql performance list <pgsql-performance@postgresql.org>
Subject: Re: PITR performance costs
Date: Mon, 28 May 2007 14:48:55 -0400
Message-ID: <AB783D40-6095-40EB-A779-B3387EF87136@fastcrypt.com> (raw)
In-Reply-To: <465B03E5.1000109@enterprisedb.com>
References: <81165B3E-1099-4388-88F1-FA27A3AD92BC@fastcrypt.com>
	<465B03E5.1000109@enterprisedb.com>

Heikki,

Don't the archived logs have to be copied as well as the regular WAL  
logs get recycled ?

Dave
On 28-May-07, at 12:31 PM, Heikki Linnakangas wrote:

> Dave Cramer wrote:
>> Since PITR has to enable archiving does this not increase the  
>> amount of disk I/O required ?
>
> There's no difference in normal DML operations, but some bulk  
> operations like CREATE INDEX that don't otherwise generate WAL,  
> need to be WAL logged when archiving is enabled.
>
> -- 
>   Heikki Linnakangas
>   EnterpriseDB   http://www.enterprisedb.com




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