[PATCH] Using TCP_NODELAY unconditionally

[Kevin Steves]

On Sat, 19 Jan 2002, Tobias Ringstrom wrote:
:When analyzing the performance of sftp some weeks ago, I discovered that
:the cause of the horrible performance was the use of the Nagle algorithm
:on the ssh TCP connection, i.e. TCP_NODELAY was not used.
:
:I propose that the following patch is applied, enabling TCP_NODELAY for
:both ssh and sshd, unconditionally.  Since the SSH channel is packet
:bases, if we want to reduce the amount of data on the wire, we should use
:a Nagle-type algorithm before making packets of the data.  It is more
:efficient to make one SSH packet of two small data "chunks" than to make
:two packets of the data chunks, even if both fit within one TCP packet.

can you provide some tcpdump traces to show nagle delays during sftp?