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From: Mark Kirkwood <markir@paradise.net.nz>
To: Simon Riggs <simon@2ndquadrant.com>
Cc: Csaba Nagy <nagy@ecircle-ag.com>
Cc: Bill Moran <wmoran@collaborativefusion.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: TB-sized databases
Date: Fri, 30 Nov 2007 12:31:01 +1300
Message-ID: <474F4BB5.7090305@paradise.net.nz> (raw)
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Simon Riggs wrote:
> On Wed, 2007-11-28 at 14:48 +0100, Csaba Nagy wrote:
>
>   
>> In fact an even more useful option would be to ask the planner to throw
>> error if the expected cost exceeds a certain threshold...
>>     
>
> Well, I've suggested it before: 
>
> statement_cost_limit on pgsql-hackers, 1 March 2006
>
> Would people like me to re-write and resubmit this patch for 8.4?
>
> Tom's previous concerns were along the lines of "How would know what to
> set it to?", given that the planner costs are mostly arbitrary numbers.
>
> Any bright ideas, or is it we want it and we don't care about the
> possible difficulties?
>
>   

Knowing how to set it is a problem - but a possibly bigger one is that 
monster query crippling your DW system, so I'd say lets have it.

Cheers

Mark



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