Re: difference in query performance due to the inclusion of a polygon geometry field

From: "Albe Laurenz" <laurenz(dot)albe(at)wien(dot)gv(dot)at>
To: <ivan(dot)marchesini(at)gmail(dot)com>
Cc: <pgsql-general(at)postgresql(dot)org>, "Mauro Rossi" <mauro(dot)rossi(at)irpi(dot)cnr(dot)it>
Subject: Re: difference in query performance due to the inclusion of a polygon geometry field
Date: 2012-11-30 14:16:15
Message-ID: D960CB61B694CF459DCFB4B0128514C208C99D90@exadv11.host.magwien.gv.at
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ivan marchesini wrote:
> Concerning the problem of the same "running time" I'm really surprised
> but I can confirm that the EXPLAIN ANALIZE time is different from the
> query execution time.
> probably it happen something like this:
> http://bytes.com/topic/postgresql/answers/422841-explain-analyze-total-runtime-walltime
> But we have tried to remove the fk constraints without any improvement
>
> Concerning the client problem, e have tried to execute the query
> directly on the server using psql.
> The difference is still in the order of seconds: around 10 ms VS 5000 ms
>
> many thanks...
>
> other suggestions?

As I said -- could the time be spent on the client?

Yours,
Laurenz Albe

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