Hello,
On 1/3/12 9:14 AM, Ali Jawad wrote:
Hi Daniel
SeLinux is disabled, as I have played around with Children and got a stable startup at CHILDREN=3, at 4 and up I get the problem described earlier right away, so it seems that MySQL is throttling Kamailio ?
1- What is the effect of running 3 children only ?
the capacity of handling sip traffic is lowered. You should still be able to handle couple of hundred messages per second if you don't have slow sql/dns operations. For production, it is recommended to have at least 8 to be in safe side.
2- I know this is not a Kamailio thing, but any idea about what needs to be changed on MySQL server to accommodate more children ? No of connections is 500 conns out of which max 120 are utilized
So mysql is on a different server, right? Are you sure there is no other switch/router doing such throttling? Can you watch on both kamailio and mysql server to see if the connections are initiated from kamailio and reaching mysql? Maybe you can discover if mysql server get the tcp connection but refuses it -- not sure if mysql server can run in debug/verbose mode to get some log messages with hints about what is the problem.
If the tcp connection does not get to mysql server, then it is a throttling in mysql client library or on a device in between the servers.
If you do 'kamctl ps' when having children=3, how many kamailio processes are there (extra should be timers, ...)? Each should have one mysql connection, so it helps to see at which number the limit starts.
Cheers, Daniel
Regards
On Mon, Jan 2, 2012 at 1:31 PM, Daniel-Constantin Mierla miconda@gmail.com wrote:
Hello,
On 1/2/12 12:24 PM, Ali Jawad wrote:
Hi Daniel Running on a LAN with no firewalls enabled,
limits can be from kernel, selinix, mysql server a.s.o. not only from firewalls.
will try you suggestion though first thing tomorrow morning, what are the implications of running children=1 ?
This will create only one worker process (not advisable for production in long term, just for testing) -- in this way there should be very few mysql connections opened, revealing if there is a problem or not with the number of connections and the short period to create them.
Cheers, Daniel
Thanks
On Mon, Jan 2, 2012 at 2:03 PM, Daniel-Constantin Mierla miconda@gmail.com wrote:
Hello,
check also for limits in the system/firewall, maybe there are limits on new connections per second. Try with children=1 and see if it happens again, if not, then it is something that blocks many new connections in short time.
Cheers, Daniel
On 1/2/12 5:31 AM, Sammy Govind wrote:
Hi, Its all upto you then, that's an intermittent issue and information is not complete to trace the issue. Did you see the same Errors every time it fails !?
-- Regards Sammy
On Sun, Jan 1, 2012 at 10:06 PM, Ali Jawadali.jawad@splendor.net wrote:
Hi Thanks for your input, but as said this works at times yes and times now so I am not sure it is a definite DB issue, the servers are in the same LAN, and there are other modules that use the DB string that work when launched before this one while this one does not work. Regards
On Sun, Jan 1, 2012 at 4:13 PM, Sammy Govindgovoiper@gmail.com wrote:
Hi, forget the whole list of errors and just resolve the DB connectivity between the Kamailio server and DB server first .
> 27(24762) ERROR: db_mysql [km_my_con.c:109]: driver error: Can't > connect to MySQL server on 'xxxxxxxxx' (4)
try connecting to the remote DB server 'xxxxxxxxx' from linux shell i.e
# mysql -u<user> -p<passwd> -h 'xxxxxxxxx'
Regards, Sammy
On Fri, Dec 30, 2011 at 3:33 PM, Ali Jawadali.jawad@splendor.net wrote: > Hi All > I have tried the below with Kamailio 3.1.0 and 3.2.1. the problem is > that Kamailio at times fails to start up for no obvious reasons, I.e. > in 10 restarts Kamailio might fail to start 3,0 or 5 times. Te debug > log "level 2 " shows the following : > > 27(24762) ERROR: db_mysql [km_my_con.c:109]: driver error: Can't > connect to MySQL server on 'xxxxxxxxx' (4) > 27(24762) ERROR:<core> [db.c:303]: could not add connection to the > pool27(24762) ERROR: group [group.c:211]: unable to connect to the > database > 27(24762) ERROR:<core> [sr_module.c:889]: init_mod_child(): Error > while initializing module group > (/usr/local/kamailio/lib/kamailio/modules_k/group.so) > 27(24762) ERROR:<core> [pt.c:481]: ERROR: fork_tcp_process(): > init_child failed for process 27, pid 24762, "tcp receiver child=1" > > and then > > > 30(24765) :<core> [pass_fd.c:293]: ERROR: receive_fd: EOF on 45 > 0(24735) ALERT:<core> [main.c:748]: child process 24762 exited > normally, status=255 > 0(24735) INFO:<core> [main.c:766]: INFO: terminating due to SIGCHLD > > The problem happens on 4 different servers, I did try to compile more > than once, the servers are 32 Bit CentOS 5.6. The connection to the > database is monitored and there are no issues with connecting to the > DB "it works at times and times not for Kamailio so a user/pwd issue > is not likely to cause this, manual cnnect worked", config file errors > are not found. > > I did also check max no of connections on MySQL server which is set to > 500 on the server and only 100 cons are used. The group module uses > the same connection string as other modules which is predefined and > there are other modules that access the db before the group module and > those do not have a problem. > > Please advice. > > Regards > > _______________________________________________ > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing > list > sr-users@lists.sip-router.org > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
-- Ali Jawad Information Systems Manager Splendor Telecom (www.splendor.net) Beirut, Lebanon Phone: +9611373725/ext 116 FAX: +9611375554
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
-- Daniel-Constantin Mierla -- http://www.asipto.com http://linkedin.com/in/miconda -- http://twitter.com/miconda
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
-- Daniel-Constantin Mierla -- http://www.asipto.com http://linkedin.com/in/miconda -- http://twitter.com/miconda