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Re: TCP network cost

From: Rusty Conover <rconover(at)infogears(dot)com>
To: Ross J(dot) Reedstrom <reedstrm(at)rice(dot)edu>
Cc: pgsql-performance <pgsql-performance(at)postgresql(dot)org>
Subject: Re: TCP network cost
Date: 2009-02-17 20:59:55
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
On Feb 17, 2009, at 1:04 PM, Ross J. Reedstrom wrote:

> On Tue, Feb 17, 2009 at 12:20:02AM -0700, Rusty Conover wrote:
>> Try running tests with ttcp to eliminate any PostgreSQL overhead and
>> find out the real bandwidth between the two machines.  If its results
>> are also slow, you know the problem is TCP related and not PostgreSQL
>> related.
> I did in fact run a simple netcat client/server pair and verified  
> that I
> can transfer that file on 0.12 sec localhost (or hostname), 0.35  
> over the
> net, so TCP stack and network are not to blame. This is purely inside
> the postgresql code issue, I believe.

What is the client software you're using?  libpq?

Rusty Conover
InfoGears Inc / /

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