Am 11-02-2014 12:45, schrieb Valentin V. Bartenev:
On Tuesday 11 February 2014 12:34:59 Aleksandar Lazic wrote:
[..]
>
> You haven't shown your server level configuration.
> Do you use deferred accept?
yes
listen <IP>:80 deferred default_server;
Ok. Two other guesses: you have tcp_syncookies disabled,
and tcp_abort_on_overflow enabled?
Please note, that with deferred accept enabled it is very
easy to have tcp_max_syn_backlog overflowed, especially
with nginx prior to 1.5.10.
sysctl -a|egrep 'tcp_syncookies|tcp_abort_on_overflow'
net.ipv4.tcp_abort_on_overflow = 0
net.ipv4.tcp_syncookies = 1
download.none.at # egrep 'tcp_syncookies|tcp_abort_on_overflow'
sysctl.txt
net.ipv4.tcp_abort_on_overflow = 0
net.ipv4.tcp_syncookies = 1
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