Tim Hockin <thockin@sun.com> writes:
> hey all,
>
> We have a request to bump up SOMAXCONN. Are there are repurcussions to
> doing so? Would it be better to make it a sysctl?
Have you checked if the requester is not satisfied with an increase
of /proc/sys/net/ipv4/tcp_max_syn_backlog? If they "know" from 2.0
that they want a SOMAXCONN increase then that's very likely the case.
In 2.2+ SOMAXCONN only applies to established sockets waiting to get
accept()ed; and when you have 128 established sockets that don't get served
by accept you have a big problem.
SYN-RECV sockets are a completely different thing and they are tuned
by the first sysctl and some other heuristics in 2.4.
You can also turn on syncookies there to handle syn-recv load spikes.
-Andi
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Jul 15 2001 - 21:00:18 EST