From: Jim Nasby <Jim.Nasby@BlueTreble.com>
To: phb07 <phb07@apra.asso.fr>
To: pgsql-performance@postgresql.org
Subject: Re: Strange nested loop for an INSERT
Date: Wed, 21 Sep 2016 16:42:04 -0500
Message-ID: <06b366f8-7e3d-ec7d-d146-1984818d3bcc@BlueTreble.com> (raw)
In-Reply-To: <224290ce-84bb-935f-1743-3f036ae3d508@apra.asso.fr>
References: <CD1B112115AFCF46A0EB8CFD8EE88B461E2B19D2@FRCRPVV9EX4MSX.ww931.my-it-solutions.net>
<1f22a3fa-dcc5-eeac-a708-7f10fada4674@apra.asso.fr>
<25256.1473691295@sss.pgh.pa.us>
<224290ce-84bb-935f-1743-3f036ae3d508@apra.asso.fr>
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On 9/12/16 1:05 PM, phb07 wrote:
> The drawback is the overhead of this added ANALYZE statement. With a
> heavy processing like in this test case, it is worth to be done. But for
> common cases, it's a little bit expensive.
You could always look at the number of rows affected by a command and
make a decision on whether to ANALYZE based on that, possibly by looking
at pg_stat_all_tables.n_mod_since_analyze.
--
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
Data in Trouble? Get it in Treble! http://BlueTreble.com
855-TREBLE2 (855-873-2532) mobile: 512-569-9461
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To: pgsql-performance@postgresql.org
Cc: Jim.Nasby@BlueTreble.com, phb07@apra.asso.fr
Subject: Re: Strange nested loop for an INSERT
In-Reply-To: <06b366f8-7e3d-ec7d-d146-1984818d3bcc@BlueTreble.com>
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