[Kamailio-Users] Shared memory

2010-03-22 Thread Bruno Machado 
I have some questions regarding the shared memory. I'm working with the version 
1.5.2 and
its environment is quite simple. It does'nt storage any informations in the 
memory, like dialplan,
contacts of subscribers, carrierroute, LCR and etc. The only purpose of this 
server is being a
redirect server. Some calls have several possible destinations, reaching easily 
12 contacts.
The config.h's constant MAX_BRANCHES is set in 12, the default number. Ok.
Like I said, almost the requests have more than 12 possible contacts. When it 
happens, Kamailio
logs these messages:

/usr/local/kamailio-1.5.2/sbin/kamailio[26188]: ERROR:core:append_branch: max 
nr of branches exceeded
/usr/local/kamailio-1.5.2/sbin/kamailio[26188]: ERROR:pv:pv_set_branch: 
append_branch action failed

Ok. It is not a problem. It is an error but it does not stop the system. The 
SIP messages still flowing 
normally. The server works for several days, 24/7 without functional errors, 
receiving 
five hundred thousand requests per day . But, usually at the weekends and the 
clock tells 2:30 am,
the company's cell phone rings bringing a message: 'the system is down'. 
Kamailio shows:

/usr/local/kamailio-1.5.2/sbin/kamailio[25492]: ERROR:core:add_avp: no more shm 
mem 
/usr/local/kamailio-1.5.2/sbin/kamailio[25492]: ERROR:exec:exec_avp: unable to 
add avp 

Kamailio stills running but it is not possible to route any request. All the 
new incoming
calls generates the same error: 'no more shm mem'. I changed the size of shared 
memory, 
running Kamailio with '-m 64', but the server stopped again after some days. I 
see the options:

- increase MAX_BRANCHES
- increase again 'm' parameter (but it will just add more some days in the 
running time)
- reduce the maximum number of contacts to 11 of the script that returns them 
to Kamailio

So, my doubts are:

- is it possible to have a memory leak when the message max nr of branches 
exceeded is showed?
- changing '-m parameter' to a higher value, like 256, could affect the 
performance?

tks friends
bruno machado



  

Veja quais são os assuntos do momento no Yahoo! +Buscados
http://br.maisbuscados.yahoo.com___
Kamailio (OpenSER) - Users mailing list
Users@lists.kamailio.org
http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
http://lists.openser-project.org/cgi-bin/mailman/listinfo/users

Re: [Kamailio-Users] Shared memory

2010-03-22 Thread Henning Westerholt 
On Monday 22 March 2010, Bruno Machado wrote:
 I have some questions regarding the shared memory. I'm working with the
  version 1.5.2 and its environment is quite simple. It does'nt storage any
  informations in the memory, like dialplan, contacts of subscribers,
  carrierroute, LCR and etc. The only purpose of this server is being a
  redirect server. Some calls have several possible destinations, reaching
  easily 12 contacts. The config.h's constant MAX_BRANCHES is set in 12, the
  default number. Ok. Like I said, almost the requests have more than 12
  possible contacts. When it happens, Kamailio logs these messages:
 
 /usr/local/kamailio-1.5.2/sbin/kamailio[26188]: ERROR:core:append_branch:
  max nr of branches exceeded
  /usr/local/kamailio-1.5.2/sbin/kamailio[26188]: ERROR:pv:pv_set_branch:
  append_branch action failed
 [..]
 /usr/local/kamailio-1.5.2/sbin/kamailio[25492]: ERROR:core:add_avp: no more
  shm mem /usr/local/kamailio-1.5.2/sbin/kamailio[25492]:
  ERROR:exec:exec_avp: unable to add avp
 
 Kamailio stills running but it is not possible to route any request. All
  the new incoming calls generates the same error: 'no more shm mem'. I
  changed the size of shared memory, running Kamailio with '-m 64', but the
  server stopped again after some days. I see the options:
 
 - increase MAX_BRANCHES
 - increase again 'm' parameter (but it will just add more some days in the
  running time) - reduce the maximum number of contacts to 11 of the script
  that returns them to Kamailio
 
 So, my doubts are:
 
 - is it possible to have a memory leak when the message max nr of branches
  exceeded is showed? - changing '-m parameter' to a higher value, like
  256, could affect the performance?

Hi Bruno,

this looks indeed like an memory leak in the code path that is executed during 
the error. Also possible is that there is (really small) mem leak in another 
code path, that gets executed a lot.

Another (unlikely) option could be that this problem is caused from shared 
memory fragmentation, as you noticed that the server gets some traffic. How 
often this error happens? Do you can clearly correlate this to the error logs 
you notice?

Anyway, you should increase the shared memory setting to 512M or higher, 
depending on the system memory. It has no negative performance impact.

Henning

___
Kamailio (OpenSER) - Users mailing list
Users@lists.kamailio.org
http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
http://lists.openser-project.org/cgi-bin/mailman/listinfo/users