From: Stephan Szabo <sszabo@megazone.bigpanda.com>
To: ryan groth <postgres@cpusoftware.com>
Cc: Steinar H. Gunderson <sgunderson@bigfoot.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Joins and full index scans...mysql vs postgres?
Date: Wed, 22 Feb 2006 10:28:25 -0800 (PST)
Message-ID: <20060222102713.Y73083@megazone.bigpanda.com> (raw)
In-Reply-To: <E1FBySH-0005Rw-1H@zeus.liquidweb.com>
References: <E1FBySH-0005Rw-1H@zeus.liquidweb.com>
On Wed, 22 Feb 2006, ryan groth wrote:
> Does this work:
>
> "Merge Left Join (cost=0.00..2656.36 rows=6528 width=1522) (actual
> time=0.057..123.659 rows=6528 loops=1)"
> " Merge Cond: ("outer".uid = "inner".uid)"
> " -> Merge Left Join (cost=0.00..1693.09 rows=6528 width=1264)
> (actual time=0.030..58.876 rows=6528 loops=1)"
> " Merge Cond: ("outer".uid = "inner".user_id)"
> " -> Index Scan using users_pkey on users (cost=0.00..763.81
> rows=6528 width=100) (actual time=0.016..9.446 rows=6528 loops=1)"
> " -> Index Scan using phorum_users_base_pkey on
> phorum_users_base (cost=0.00..822.92 rows=9902 width=1168) (actual
> time=0.007..15.674 rows=9845 loops=1)"
> " -> Index Scan using useraux_pkey on useraux (cost=0.00..846.40
> rows=7582 width=262) (actual time=0.007..11.935 rows=7529 loops=1)"
> "Total runtime: 127.442 ms"
Well, this implies the query took about 127 ms on the server side. Where
did the 1000 ms number come from (was that on a client, and if so, what
type)?
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To: pgsql-performance@postgresql.org
Cc: sszabo@megazone.bigpanda.com, postgres@cpusoftware.com, sgunderson@bigfoot.com
Subject: Re: Joins and full index scans...mysql vs postgres?
In-Reply-To: <20060222102713.Y73083@megazone.bigpanda.com>
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