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From: Ivan Voras <ivoras@freebsd.org>
To: pgsql-performance@postgresql.org
Subject: Re: Postgres insert performance and storage requirement compared to Oracle
Date: Wed, 27 Oct 2010 12:13:10 +0200
Message-ID: <ia8tvj$15r$1@dough.gmane.org> (raw)
In-Reply-To: <AANLkTinaW3ZtGJbzgAARG0WfAOJxSPAbdVAZa6X_2dh+@mail.gmail.com>
References: <402913.53404.qm@web65405.mail.ac4.yahoo.com>
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	<208728.42197.qm@web65409.mail.ac4.yahoo.com>
	<AANLkTikeYj52q1v1RcwCYR=9Kv5mxJmh+Q+KvXcmibYK@mail.gmail.com>
	<770715.39613.qm@web29003.mail.ird.yahoo.com>
	<AANLkTinaW3ZtGJbzgAARG0WfAOJxSPAbdVAZa6X_2dh+@mail.gmail.com>

On 10/26/10 17:41, Merlin Moncure wrote:
> On Tue, Oct 26, 2010 at 11:08 AM, Leonardo Francalanci <m_lists@yahoo.it> wrote:
>>> temp  tables are not wal logged or
>>> synced.  Periodically they can be flushed  to a permanent table.
>>
>>
>> What do you mean with "Periodically they can be flushed  to
>> a permanent table"? Just doing
>>
>> insert into tabb select * from temptable
>>
> 
> yup, that's exactly what I mean -- this will give you more uniform

In effect, when so much data is in temporary storage, a better option
would be to simply configure "synchronous_commit = off" (better in the
sense that the application would not need to be changed). The effects
are almost the same - in both cases transactions might be lost but the
database will survive.





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