Varnish 2.0.6 thread pile-up

[Flavio Torres]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 12/20/2010 09:05 AM, Dennis Hendriksen wrote:
> Furthermore we sometimes see the following in /var/log/messages:
> Dec 19 22:40:04 cache1 kernel: possible SYN flooding on port 80. Sending
> cookies.
> Dec 19 22:41:05 cache1 kernel: possible SYN flooding on port 80. Sending
> cookies.

Try to change at your sysctl.conf the following value:

net.ipv4.tcp_syncookies = 0


See: http://www.varnish-cache.org/trac/wiki/Performance


hope this helps
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iEYEARECAAYFAk0PYY0ACgkQNRQApncg2948vgCfaxCKQoCwPGG5GSNwXv45DcIg
CIAAniRud/SV/vzBTaZb3xlcbIOKAPPz
=fygR
-----END PGP SIGNATURE-----