nanog mailing list archives
Re: Adjusting TCP windows on production systems?
From: Steve Francis <steve () expertcity com>
Date: Tue, 30 Sep 2003 15:27:28 -0700
Marshall Eubanks wrote:
On Tue, 30 Sep 2003 15:44:03 -0400 "Temkin, David" <temkin () sig com> wrote:Is there anyone in a production environment who, as part of their system build process, adjusts the TCP receive window/MSS/etc. on production systems?
As a concrete data point:the tuning below on Solaris 9 increased the TCP data transfer rates from SJC to NYC by a factor of 10:
(i.e. from 2 to about 20Mbps with ftp; 1 to 11Mbps with scp.) ndd -set /dev/tcp tcp_recv_hiwat 400000ndd -set /dev/tcp tcp_xmit_hiwat 400000 ndd -set /dev/tcp tcp_wscale_always 1
ndd -set /dev/tcp tcp_max_buf 10485760
Current thread:
- Adjusting TCP windows on production systems? Temkin, David (Sep 30)
- Re: Adjusting TCP windows on production systems? Steve Francis (Sep 30)
- Re: Adjusting TCP windows on production systems? Rob Thomas (Sep 30)
- Re: Adjusting TCP windows on production systems? Marshall Eubanks (Sep 30)
- Re: Adjusting TCP windows on production systems? Steve Francis (Sep 30)
- Re: Adjusting TCP windows on production systems? Steve Francis (Sep 30)