On Thu, May 28, 2009 at 12:59 PM, Iñaki Baz Castillo <[email protected]> wrote:
> 2009/5/28 Pascal Maugeri <[email protected]>: > > FYI, I've changed the configuration to: > > > > tcp_children=8 > > tcp_send_timeout=3 > > tcp_connect_timeout=5 > > > > and it looks we get less often the problem described here ( > tcp_connect/send > > time out error). > > This is a good workaround, but the problem is that it replies on the > clients behaviour and it shouldn't occur (a server cannot get > "blocked" due to clients problems). I hope TCP handling will be > improved in SIP-Router. > Indeed the very same problem occured after a while :-( It looks my new configuration only "delayed" it. The symptoms are: - errors in log file: May 27 14:20:11 server2-operations /usr/local/sbin/kamailio[26227]: WARNING:core:send2child: no free tcp receiver, connection passed to the leastbusy one (1) May 27 14:20:13 server2-operations /usr/local/sbin/kamailio[26221]: ERROR:core:tcp_blocking_connect: timeout 10 s elapsed from 10 s May 27 14:20:13 server2-operations /usr/local/sbin/kamailio[26221]: ERROR:core:tcpconn_connect: tcp_blocking_connect failed May 27 14:20:13 server2-operations /usr/local/sbin/kamailio[26221]: ERROR:core:tcp_send: connect failed May 27 14:20:13 server2-operations /usr/local/sbin/kamailio[26221]: ERROR:sl:msg_send: tcp_send failed - in top <http://unixhelp.ed.ac.uk/CGI/man-cgi?top> kamailio process have high values in the %CPU column such as 50% or 99% !? - when all kamailio processes have reached this top values, it is impossible to connect a new client untill we reset kamailio :-/ I will try the parameter modparam("registrar", "tcp_persistent_flag", 7) from the registrar module. -pascal > > > > I confirm that the problem was triggered by the fact that our client is > > using TCP only and that the tcp connections were unavailable after some > > presence test (many NOTIFY messages sent to TCP). > > > > I'm curious to know how many children do you use in a typical > configuration > > ? 4, 8, more? Of course it depends on the traffic expected but let me > know > > that this is parameter you always increase in a production environment. > > Theorically you can add so many TCP listeners as you desire (depending > on your CPU's and memory). But if your environment makes high usage of > TCP then increase it as much as possible. > > > > -- > Iñaki Baz Castillo > <[email protected]> >
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