Updating our TCP and socket sysctl values...
Alexander Leidinger
Alexander at Leidinger.net
Sat Mar 19 15:04:06 UTC 2011
On Sat, 19 Mar 2011 15:37:47 +0900 George Neville-Neil
<gnn at neville-neil.com> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Howdy,
>
> I believe it's time for us to upgrade our sysctl values for TCP
> sockets so that they are more in line with the modern world. At the
> moment we have these limits on our buffering:
>
> kern.ipc.maxsockbuf: 262144
> net.inet.tcp.recvbuf_max: 262144
> net.inet.tcp.sendbuf_max: 262144
>
> I believe it's time to up these values to something that's in line
> with higher speed local networks, such as 10G. Perhaps it's time to
> move these to 2MB instead of 256K.
>
> Thoughts?
I suggest to read
http://www.bufferbloat.net/projects/bloat/wiki/Bufferbloat
and do a before/after test to make sure we do not suffer from the
described problem. Jim Getty has test descriptions:
http://gettys.wordpress.com/category/bufferbloat/
Bye,
Alexander.
More information about the freebsd-arch
mailing list