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From: Kevin Grittner <Kevin.Grittner@wicourts.gov>
To: Tom Lane <tgl@sss.pgh.pa.us>
To: Axel Waggershauser <awagger@web.de>
Cc: pgsql-performance@postgresql.org
Subject: Re: Low throughput of binary inserts from windows to
Date: Mon, 11 Dec 2006 10:25:14 -0600
Message-ID: <457D320A.EE98.0025.0@wicourts.gov> (raw)
In-Reply-To: <5e66c6e90612110658r3c0918f6v4fd3682363db5c15@mail.gmail.com>
References: <5e66c6e90612080417r23ecaea4p210905f868c26c7f@mail.gmail.com>
	<5e66c6e90612081724m57293ffdy21d6b45697e69bd4@mail.gmail.com>
	<3317.1165636358@sss.pgh.pa.us>
	<5e66c6e90612110658r3c0918f6v4fd3682363db5c15@mail.gmail.com>

>>> On Mon, Dec 11, 2006 at  8:58 AM, in message
<5e66c6e90612110658r3c0918f6v4fd3682363db5c15@mail.gmail.com>, "Axel
Waggershauser" <awagger@web.de> wrote: 
> 
> I'm out of ideas here, maybe someone could try to reproduce this
> behavior or could point me to the thread containing relevant
> information
 
No guarantees that this is the problem, but I have seen similar issues
in other software because of delays introduced in the TCP stack by the
Nagle algorithm.  Turning on TCP_NODELAY has solved such problems.  I
don't know if PostgreSQL is vulnerable to this, or how it would be fixed
in a PostgreSQL environment, but it might give you another avenue to
search.
 
-Kevin
 

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