Re: Simple postgresql.conf wizard - Mailing list pgsql-hackers

From Robert Haas
Subject Re: Simple postgresql.conf wizard
Date
Msg-id 603c8f070812032201id37d3a0l51190c207a781744@mail.gmail.com
Whole thread Raw
In response to Re: Simple postgresql.conf wizard  ("Mark Wong" <markwkm@gmail.com>)
List pgsql-hackers
>> I think the tests you could consider next is to graph the target going from
>> 10 to 100 in steps of 10 just for those 5 queries.  If it gradually
>> degrades, that's interesting but hard to nail down.  But if there's a sharp
>> transition, getting an explain plan for the two sides of that should provide
>> some insight.  I'm really more interested in the ones that slowed down than
>> the one that improved, understanding that might finally provide some
>> evidence against increasing it by default.
>
> I've updated the charts to include results from setting
> default_statistics_target from 20-90.  The links to the charts are the
> same.  The links to the raw data are in
> http://207.173.203.223/~markwkm/community6/dbt3/ in directories 45-52.

I still think we're missing the boat here because it's not really the
same query every time.

...Robert


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