3 Jan
2012
3 Jan
'12
11:44 a.m.
Hello,
just another idea to try, not sure if it is convenient -- can you
install and use different version of mysql server and client library?
This should reveal whether is an issue specific to mysql version.
Cheers,
Daniel
On 1/3/12 11:35 AM, Daniel-Constantin Mierla wrote:
Hello,
all it is fine with the output. So it looks like the limit is
somewhere above 25 connections.
As a try of making a workaround in kamailio side, could be a patch to
add a global parameter to introduce some latency before forking a
worker, so these processes won't be created all at a time, but one
after the other.
However, would be good to find the real reason for such behavior. If
the tcp connection gets to mysql server, maybe the question should be
addressed to mysql forums/mailing lists.
Cheers,
Daniel
On 1/3/12 10:48 AM, Ali Jawad wrote:
--
Daniel-Constantin Mierla -- http://www.asipto.com
http://linkedin.com/in/miconda -- http://twitter.com/miconda
Hi
I dont think a few hundred per second is enough I need to find out
what is wrong and bring up no of children to 8. The MySQL server is at
another host on the same LAN, as for the command kamctl ps see below
Process:: ID=0 PID=13949 Type=attendant
Process:: ID=1 PID=13950 Type=udp receiver child=0
sock=xx.xx.xx.xx:5060
Process:: ID=2 PID=13951 Type=udp receiver child=1
sock=xx.xx.xx.xx:5060
Process:: ID=3 PID=13952 Type=udp receiver child=2
sock=xx.xx.xx.xx:5060
Process:: ID=4 PID=13953 Type=udp receiver child=0
sock=xx.xx.xx.xx:5061
Process:: ID=5 PID=13954 Type=udp receiver child=1
sock=xx.xx.xx.xx:5061
Process:: ID=6 PID=13955 Type=udp receiver child=2
sock=xx.xx.xx.xx:5061
Process:: ID=7 PID=13956 Type=udp receiver child=0 sock=xx.xx.xx.xx:443
Process:: ID=8 PID=13957 Type=udp receiver child=1 sock=xx.xx.xx.xx:443
Process:: ID=9 PID=13958 Type=udp receiver child=2 sock=xx.xx.xx.xx:443
Process:: ID=10 PID=13959 Type=udp receiver child=0
sock=xx.xx.xx.xx:8080
Process:: ID=11 PID=13960 Type=udp receiver child=1
sock=xx.xx.xx.xx:8080
Process:: ID=12 PID=13961 Type=udp receiver child=2
sock=xx.xx.xx.xx:8080
Process:: ID=13 PID=13962 Type=udp receiver child=0
sock=xx.xx.xx.xx:123
Process:: ID=14 PID=13963 Type=udp receiver child=1
sock=xx.xx.xx.xx:123
Process:: ID=15 PID=13964 Type=udp receiver child=2
sock=xx.xx.xx.xx:123
Process:: ID=16 PID=13965 Type=slow timer
Process:: ID=17 PID=13966 Type=timer
Process:: ID=18 PID=13967 Type=MI FIFO
Process:: ID=19 PID=13968 Type=ctl handler
Process:: ID=20 PID=13969 Type=TIMER NH
Process:: ID=21 PID=13970 Type=tcp receiver child=0
Process:: ID=22 PID=13971 Type=tcp receiver child=1
Process:: ID=23 PID=13972 Type=tcp receiver child=2
Process:: ID=24 PID=13973 Type=tcp main process
I use a few different ports as you can see.
All fine with that output at 3 ?
Regards
On Tue, Jan 3, 2012 at 11:29 AM, Daniel-Constantin Mierla
<miconda(a)gmail.com> wrote:
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(a)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(a)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 Jawad<ali.jawad(a)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 Govind<govoiper(a)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
>>>>> Jawad<ali.jawad(a)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(a)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(a)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(a)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(a)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(a)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
>
--
Daniel-Constantin Mierla -- http://www.asipto.com
http://linkedin.com/in/miconda -- http://twitter.com/miconda