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From: Richard Huxton <dev@archonet.com>
To: dforums <dforums@vieonet.com>
Cc: Merlin Moncure <mmoncure@gmail.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Plz Heeeelp! performance settings
Date: Thu, 07 Aug 2008 15:12:54 +0100
Message-ID: <489B02E6.4010701@archonet.com> (raw)
In-Reply-To: <489AF8E8.6070503@vieonet.com>
References: <35FABCF85D99464FB00BC5123DC2A70A051D0FB8@s228130hz1ew09.apptix-01.savvis.net>
	<276541.4189.qm@web25805.mail.ukl.yahoo.com>
	<35FABCF85D99464FB00BC5123DC2A70A051D11E1@s228130hz1ew09.apptix-01.savvis.net>
	<48908988.7020204@emolecules.com>
	<Pine.LNX.4.64.0807301656020.4250@aragorn.flymine.org>
	<1217436578.6288.44.camel@localhost>
	<1240.1217440309@sss.pgh.pa.us>
	<1217441061.6288.47.camel@localhost>
	<489A21C2.8060801@vieonet.com>
	<b42b73150808061916j74fd5334y318ef3819fa49ea8@mail.gmail.com>
	<489AA5B5.9080109@vieonet.com>
	<489AB375.3090901@archonet.com>
	<489ABC8F.4030007@vieonet.com>
	<489AD118.5010902@archonet.com>
	<489AF8E8.6070503@vieonet.com>

dforums wrote:
> The performance problem is really only on the insertion and even more on 
> the treatment for the aggregation.
> 
> To treat the 3000 entrances and to insert, or update the tables it needs 
> 10 minutes.
> 
> As I told you I inject 14000 query every 2 minutes, and it needs 10 
> minutes to treat 3000 of those query.

Sorry - I still don't understand. What is this "treatment" you are doing?

>  >
>  > OK. I assume you're happy with the plans you are getting on these
>  > queries, since you've not provided any information about them.
> 
> The plan seems ok as it use index as well.
> here is the plan :
> 
> explain analyse SELECT "insertUpdateTracks"(137,2605, 852, ('2008-08-06 
> 19:28:54'::text)::date,3,'dailydisplay',2,NULL);
> INFO:  method 1
>                                      QUERY PLAN
> ------------------------------------------------------------------------------------ 
> 
>  Result  (cost=0.00..0.01 rows=1 width=0) (actual time=1.151..1.151 
> rows=1 loops=1)
>  Total runtime: 1.160 ms

There's nothing to do with an index here - this is a function call.

>  Has you can see the runtime processs for an update in this table.
> 
> multiplying this per 10000, it is too long.

So - are you calling this function 14000 times to inject your data? 
You're doing this in one transaction, yes?

-- 
   Richard Huxton
   Archonet Ltd



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