[SR-Users] When too many calls, calls does not complete, too much delay when placing calls

Jeremya jeremy at electrosilk.net
Wed Dec 1 23:43:17 CET 2010


I had this problem on one (dual xeon) system. The cause was a very slow
disk system - it was SAS but the OS decided to use it as IDE - and the
killer was bandwidth logging by iptables.

Checking with wireshark it could sometimes take over a second for a
packet to get out of an interface.

When I changed the disk driver and turned off bandwidth logging all the
problems went away.

Vic Jolin wrote:
> Hi my syslog.conf already has something like that, any other place I
> should look at?
>
> On Thu, Dec 2, 2010 at 4:44 AM, Daniel-Constantin Mierla
> <miconda at gmail.com <mailto:miconda at gmail.com>> wrote:
>
>
>
>     On 12/1/10 9:41 PM, Vic Jolin wrote:
>>     debug level is 9, do I have to set syslog to be configured
>>     asynchronously for this?
>>
>>     The rate of the calls is not more than 20 cps
>     if you diverted the log messages to a specific file, then add a
>     dash '-' in front of file path:
>
>     http://www.kamailio.org/dokuwiki/doku.php/tutorials:debug-syslog-messages#custom_syslog_file
>
>     Cheers,
>     Daniel
>
>
>>
>>     On Thu, Dec 2, 2010 at 4:35 AM, Daniel-Constantin Mierla
>>     <miconda at gmail.com <mailto:miconda at gmail.com>> wrote:
>>
>>         Hello,
>>
>>
>>         On 12/1/10 9:33 PM, Vic Jolin wrote:
>>
>>             Hi all,
>>
>>             Just want to ask if anybody here has come across this
>>             problem of mine, when single call proxy is ok, but when
>>             you send more traffic to it, calls somehow get stuck,
>>             trying to make a new call it takes a lot of time and so
>>             it times out.
>>
>>             Does anybody know what could be the problem?
>>
>>         looks like you have some blocking operation there. Is it
>>         default config? What is debug level you use (if it is high,
>>         then be sure syslog is configured asynchronously). What is
>>         the rate of the new calls you send?
>>
>>         Cheers,
>>         Daniel
>>
>>         -- 
>>         Daniel-Constantin Mierla
>>         Kamailio (OpenSER) Advanced Training
>>         Jan 24-26, 2011, Irvine, CA, USA
>>         http://www.asipto.com
>>
>>
>
>     -- 
>     Daniel-Constantin Mierla
>     Kamailio (OpenSER) Advanced Training
>     Jan 24-26, 2011, Irvine, CA, USA
>     http://www.asipto.com
>
>
> ------------------------------------------------------------------------
>
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