From: Tom Lane <tgl@sss.pgh.pa.us>
To: "Tomas Vondra" <tv@fuzzy.cz>
cc: "Mark Kirkwood" <mark.kirkwood@catalyst.net.nz>,
 "Andres Freund" <andres@2ndquadrant.com>, pgsql-performance@postgresql.org
Subject: Re: 60 core performance with 9.3
In-reply-to: <3e6b532b0115ffff08e8d0debd76695b.squirrel@sq.gransy.com>
References: <53ACB190.2030206@catalyst.net.nz>
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 <53ACD6C4.9050605@catalyst.net.nz>
 <20140627091951.GA16680@awork2.anarazel.de>
 <53B283F3.7020005@catalyst.net.nz>
 <20140701101307.GO21422@awork2.anarazel.de>
 <53BF326F.2070903@catalyst.net.nz>
 <20140711082207.GI17261@awork2.anarazel.de>
 <53C711B6.5040802@catalyst.net.nz> <53D84E16.90609@catalyst.net.nz>
 <3e6b532b0115ffff08e8d0debd76695b.squirrel@sq.gransy.com>
Comments: In-reply-to "Tomas Vondra" <tv@fuzzy.cz>
 message dated "Wed, 30 Jul 2014 10:42:17 +0200"
Date: Wed, 30 Jul 2014 08:39:52 -0400
Message-ID: <26683.1406723992@sss.pgh.pa.us>
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"Tomas Vondra" <tv@fuzzy.cz> writes:
> On 30 Červenec 2014, 3:44, Mark Kirkwood wrote:
>> While these numbers look great in the middle range (12-96 clients), then
>> benefit looks to be tailing off as client numbers increase. Also running
>> with no stats (and hence no auto vacuum or analyze) is way too scary!

> By disabling statistics collector you loose runtime counters - number of
> sequential/index scans on a table, tuples read from a relation aetc. But
> it does not influence VACUUM or planning at all.

It does break autovacuum.

			regards, tom lane


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