| From: | Dann Corbit <DCorbit(at)connx(dot)com> |
|---|---|
| To: | 'Rob Brown-Bayliss' <r(dot)brown(dot)bayliss(at)gmail(dot)com>, "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: Libpq is very slow on windows but fast on linux. |
| Date: | 2010-11-10 05:53:21 |
| Message-ID: | 87F42982BF2B434F831FCEF4C45FC33E42078CA1@EXCHANGE.corporate.connx.com |
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| Lists: | pgsql-general |
> -----Original Message-----
> From: pgsql-general-owner(at)postgresql(dot)org [mailto:pgsql-general-
> owner(at)postgresql(dot)org] On Behalf Of Rob Brown-Bayliss
> Sent: Tuesday, November 09, 2010 8:20 PM
> To: pgsql-general(at)postgresql(dot)org
> Subject: Re: [GENERAL] Libpq is very slow on windows but fast on linux.
>
> Further testing shows it is windows networking causing the issue.
> Copying files to and from the server is 5 to 6 times slower on a
> Windows client compared to the Linux client.
>
> The issue is not specific to libpq.
Check your Nagle setting.
http://support.microsoft.com/kb/138831
See also:
http://apocryph.org/2006/07/08/achieving_maximum_tcp_performance_on_windows_xp_2k3/
P.S.
Iperf is really useful to see how well things are going as a diagnostic tool:
http://sourceforge.net/projects/iperf/files/
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