Re: Adjusting TCP windows on production systems?

[Steve Francis]

Marshall Eubanks wrote:

On Tue, 30 Sep 2003 15:44:03 -0400
"Temkin, David" <[EMAIL PROTECTED]> 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 400000
ndd -set /dev/tcp tcp_xmit_hiwat 400000 
ndd -set /dev/tcp tcp_wscale_always 1
ndd -set /dev/tcp tcp_max_buf 10485760