From: Kevin Grittner <kgrittn@ymail.com>
To: Jeison Bedoya <jeisonb@audifarma.com.co>
To: pgsql-performance@postgresql.org <pgsql-performance@postgresql.org>
Subject: Re: Process in state BIND, authentication, PARSE
Date: Wed, 10 Jul 2013 06:37:33 -0700 (PDT)
Message-ID: <1373463453.36614.YahooMailNeo@web162904.mail.bf1.yahoo.com> (raw)
In-Reply-To: <51DAF079.1080502@audifarma.com.co>
References: <51DAE734.3090706@audifarma.com.co>
<51DAEB63.3050607@dunslane.net>
<51DAF079.1080502@audifarma.com.co>
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Jeison Bedoya <jeisonb@audifarma.com.co> wrote:
> Ram: 128GB
> max_connections = 900
> temp_buffers = 128MB
Besides the concerns already expressed about work_mem, temp_buffers
could be a big problem. If a connection uses temp tables it
acquires up to 128MB, *and holds on it reserved for caching temp
tables for that connection for as long as the connection lasts*.
So, for 900 connections, that could be 112.5 GB. I would expect to
see performance decrease and eventually completely tank as more
connections reserved memory for this purpose.
--
Kevin Grittner
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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To: pgsql-performance@postgresql.org
Cc: kgrittn@ymail.com, jeisonb@audifarma.com.co
Subject: Re: Process in state BIND, authentication, PARSE
In-Reply-To: <1373463453.36614.YahooMailNeo@web162904.mail.bf1.yahoo.com>
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