Date: Wed, 30 Jul 2008 20:59:22 -0400
From: Bill Moran <wmoran@collaborativefusion.com>
To: tarcizioab@c3sl.ufpr.br
Cc: pgsql-performance@postgresql.org
Subject: Re: Difference between "Explain analyze" and "\timing"
Message-Id: <20080730205922.ba73b732.wmoran@collaborativefusion.com>
In-Reply-To: <50061.201.15.49.76.1217463555.squirrel@webmail.inf.ufpr.br>
References: <50061.201.15.49.76.1217463555.squirrel@webmail.inf.ufpr.br>
Organization: Collaborative Fusion Inc.
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tarcizioab@c3sl.ufpr.br wrote:
>
> Hello friends
> 
> The commands "\timing" and "EXPLAIN ANALYZE" return values related to the
> time of execution of the instruction. These values are "Time:" and "Total
> runtime:" respectively. What is the difference between these values, and
> the specific use of each command in queries?

The time reported by explain will be the time it took the server to
execute the query.

The time reported by \timing is the time it takes the client (psql) to
get the result.  This will be the time the server took, plus any network
delays and time required to process the query and result on the client
side.

-- 
Bill Moran
Collaborative Fusion Inc.

wmoran@collaborativefusion.com
Phone: 412-422-3463x4023

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