Re: ANALYZE sampling is too good - Mailing list pgsql-hackers

From Mark Kirkwood
Subject Re: ANALYZE sampling is too good
Date
Msg-id 52A81DC3.2060105@catalyst.net.nz
Whole thread Raw
In response to Re: ANALYZE sampling is too good  (Simon Riggs <simon@2ndQuadrant.com>)
List pgsql-hackers
On 11/12/13 19:34, Simon Riggs wrote:
>
> Realistically, I never heard of an Oracle DBA doing advanced
> statistical mathematics before setting the sample size on ANALYZE. You
> use the default and bump it up if the sample is insufficient for the
> data.
>

I'm not sure that Oracle's stats and optimizer design is an example to 
be envied - pretty much all Oracle DBA's I've encountered will apply 
hints all queries to get the plan they want...

Regards

Mark



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