Re: pre-2.0.30 SOMAXCONN Value

Alan Cox (alan@lxorguk.ukuu.org.uk)
Sat, 29 Mar 1997 12:16:50 +0000 (GMT)

> Running 2.0.pre-30, I tried increasing SOMAXCONN (linux/socket.h) to 256
> and 512 in include/linux/socket.h, as I was running out of sockets at the
> default 128. That caused the network to hang; I could not get the Web
> server to respond. Going back to 128 got it all working.

I bet.

> Should it be possible to increase SOMAXCONN, or does that interact
> with/break the socket hash stuff? It looks like there are a few hardcoded
> 128 values in the pre-2.0.30 patch, but I'm not sure what they do.

Because the backlog queue is a signed char. If you change that (and test you
got all the cases), your machine should be happy with a 512 SOMAXCONN