How do I set the TCP Initial Window size to 10-50KB? (i.e. how configure TCP Slow-Start/Anti-Congestion to burst 10-50KB w.o. interference)

[Tinker]

Hi!

I have a server where the ping time to remote web clients can be Very 
big so I want to minimize the number of roundtrips done per connection 
and request, while I know that I always have more Internet connection 
bandwidth available.

How do I make TCP stack's initial window 10-50KB, so that I can burst 
that amount of data without any interference from the TCP slow-start/RFC 
3390 anti-congestion whatsoever?


(Or perhaps rather than to a fixed number like 10-50KB, the Initial 
Window could be set to the client's receive buffer size.)

(The closest option I see is net.inet.tcp.mssdflt setting in 
http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man8/sysctl.8?query=sysctl&sec=8 
. I don't see where cwnd is initialized in 
http://fxr.watson.org/fxr/source/netinet/tcp_input.c?v=OPENBSD and 
http://fxr.watson.org/fxr/source/netinet/tcp_output.c?v=OPENBSD , 
perhaps that would be a key.)

Thanks!!
Tinker