Hi,
I'm seeing fairly high values for 'failed connection attempts' reported by netstat -s. The values reported just under 10% of the 'active connections openings' value. The full output from netstat -s is below.
Although we've not noticed any real problems I was just wondering what causes the failed connection attempts, are they indicative of a some resource shortage with the server, an indication of miss-behaving clients or network hardware or just a fact of life?
The most common case is that the accept queue is full, and you already have a bunch of requests sitting in the syn queue. Your listener is underconfigured, going by the other stats.
You could try bumping up /proc/sys/net/ipv4/tcp_max_syn_backlog.
(This is not persistent across boots, so you can put in a sysctl boot line for net.ipv4.tcp_max_syn_backlog).
thanks, Nivedita
- : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
