From: Richard Huxton <dev@archonet.com>
To: Josep Maria Pinyol Fontseca <jmpinyol@endepro.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Windows performance again
Date: Wed, 21 Dec 2005 09:58:48 +0000
Message-ID: <43A92758.6060709@archonet.com> (raw)
In-Reply-To: <43A91ABE.9070000@endepro.com>
References: <43A91ABE.9070000@endepro.com>
Josep Maria Pinyol Fontseca wrote:
>
> Linux box with psql version 7.2.1 versus Windows XP server:
>
> select * from <table>; -> 7 seconds aprox. to obtain a results.
> Network utilization: 100%
>
> Windows XP client box with psql version 8.1.1 versus Windows XP server:
>
> select * from <table>; -> 60 seconds aprox. to obtain a results!!!!!!!!!!!!
> Network utilization: 3%
>
> Windows XP server box with psql version 8.1.1 versus Windows XP server:
>
> select * from <table>; -> <1 seconds aprox. to obtain a results.
> Network utilization: 0%
It's *got* to be the network configuration on the client machine. I'd be
tempted to install ethereal on the linux box and watch for the
difference between the two networked sessions.
I'm guessing it might be something to do with TCP/IP window/buffer sizes
and delays on ACKs - this certainly used to be an issue on older MS
systems, but I must admit I thought they'd fixed it for XP.
If not that, could some firewall/security system be slowing network traffic?
--
Richard Huxton
Archonet Ltd
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: dev@archonet.com, jmpinyol@endepro.com
Subject: Re: Windows performance again
In-Reply-To: <43A92758.6060709@archonet.com>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox