From: Tom Lane <tgl@sss.pgh.pa.us>
To: Richard Broersma Jr <rabroersma@yahoo.com>
Cc: Bryce Nesbitt <bryce1@obviously.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Very slow DELETE on 4000 rows of 55000 row table
Date: Thu, 05 Apr 2007 01:23:50 -0400
Message-ID: <19114.1175750630@sss.pgh.pa.us> (raw)
In-Reply-To: <880852.63314.qm@web31801.mail.mud.yahoo.com>
References: <880852.63314.qm@web31801.mail.mud.yahoo.com>
Richard Broersma Jr <rabroersma@yahoo.com> writes:
>> But I DELETE all conflicting those rows prior to the slow DELETE, just
>> so the FK check is never hit. Should I be looking at subverting the FK
>> check mechanism somehow? The necessary index would be huge, and
>> relevant only on this particular operation which happens every few
>> months, if that.
> true, but without an index, it still has to scan the table just to be sure.
If this is only a once-in-awhile thing, maybe you could build the index,
do the deletes, drop the index ...
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, rabroersma@yahoo.com, bryce1@obviously.com
Subject: Re: Very slow DELETE on 4000 rows of 55000 row table
In-Reply-To: <19114.1175750630@sss.pgh.pa.us>
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