[Info-vax] TCPIP RWAST

[Colin Butcher]

If things have changed elsewhere (firewall maybe), sometimes I've found 
that TCPIP keepalives need to be enabled. With a lot of simultaneous 
TCPIP connections, it can also be worth modifying some of the internal 
values.

There's a clunky SYSCONFIGTAB mechanism for changing some of the 
settings, which takes a text file (called a stanza file) as input. It is 
documented, although the available documentation is fairly ancient. 
Incidentally, some documentation updates made it into the release notes, 
but not into the documentation itself.

I tend to apply the following changes using a text file as input to the 
SYSCONFIGTAB mechanism:

socket:
         somaxconn=65535
         sominconn=65535
inet:
         tcbhashsize=16384
         tcbhashnum=16
         tcp_keepalive_default=1
         tcp_keepidle=1200

It might be helpful. YMMV!

Cheers, Colin.