Steve Francis wrote:
Just as a head up - this sort of below should not be done on things like web servers that support lots of concurrent connections - you'll eat all your memory for sockets.
Unless you have something like FreeBSD´s auto-tuning inflight window stuff which would allow large windows to be allocated only when the delay*bandwidth product justifies it. Pete
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 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