[Serusers] SER hung - Log Information?

[Bogdan-Andrei Iancu]

using external scripts via exec() has a very bad impact on performance 
due dynamically creation/termination of processes. Each exec() forks 
approximately twice or even more (depending of your script) - so you 
will have a lot of additional sys time.
for production env. you should try yo drop exec().

bogdan

Matt Schulte wrote:

>Interesting, we also use an external process to connect to a DB and
>retrieve URI replacement. We were thinking that it's running "too slow"
>and thus hanging SER, even though the logs make it appear as if the
>process(es) was hanging at random points. We're in the process of
>eliminating this script and switching over to ENUM or similar. When we
>restarted our MySQL server it improved the query time (it was running
>for 180 days heheh) and seems to have made SER hang less. How long does
>your external script take to run on average? If it's more than a second
>then that seems to be unnacceptable for SER.. 
>
>P.S. The crappy thing is this happens over a period of time, when I load
>tested the server it ran flawlessly. Pushed 30000 calls through it in
>less than an hour with no problems. The MySQL server in question is in
>the same switch segment/subnet as well.
>
>
>	Matt
>
>-----Original Message-----
>From: Ricardo Martinez [mailto:rmartinez at redvoiss.net] 
>Sent: Thursday, April 14, 2005 4:32 PM
>To: Matt Schulte; serusers at lists.iptel.org
>Subject: RE: [Serusers] SER hung - Log Information?
>
>
>Hello Matt.
>	Thanks for your answer, i checked the post "exec_dset fork
>limit?"
>(http://lists.iptel.org/pipermail/serusers/2004-December/014150.html)
>and i think i have the same problem.  I'm using the exec_dset command to
>manipulate the RURI, we need to do this in order to add prefixes
>according to certain user profiles.
>
>route {
>        if (method=="INVITE" ||  method=="CANCEL") {
>                exec_dset("/usr/local/etc/ser/translate");
>        };
>
>As you can see i'm using it for every INVITE and CANCEL, the "translate"
>file is a C program that connects to a DB and returns the desired RURI.
>Could this be the cause of SER freeze?.  Can we have an opinion from the
>developers? Is there a way to do the same thing with maybe another
>module?. For the record i'm using : 
>
>OS : Linux Red Hat 9.0
>SER : 0.8.14
>Mediaproxy : 1.2.1
>
>I would really appreciate any help here.
>Thanks!!
>
>Best Regards,
>
>Ricardo.-
>
>  
>
>>-----Mensaje original-----
>>De: Matt Schulte [mailto:mschulte at netlogic.net]
>>Enviado el: Jueves, 14 de Abril de 2005 16:11
>>Para: Ricardo Martinez; serusers at lists.iptel.org
>>Asunto: RE: [Serusers] SER hung - Log Information?
>>
>>
>>I've been posting about this for some time now,I have never
>>been able to
>>figure out the problem. Do you use external proccesses or anything?
>>That's the only "weird" thing we really do with SER, 
>>everything else is
>>pretty straight forward.
>>
>>Search back from my posts and see what you think.
>>
>>-----Original Message-----
>>From: Ricardo Martinez [mailto:rmartinez at redvoiss.net]
>>Sent: Thursday, April 14, 2005 11:16 AM
>>To: 'serusers at lists.iptel.org'
>>Subject: [Serusers] SER hung - Log Information?
>>
>>
>>Hello list.
>>	I had been experimenting some weird behavior in my SER program.
>>    
>>
>A 
>  
>
>>couple of times my SER seems to be hung.  For example the first time,
>>all the REGISTER messages reaching  the server were not 
>>challenged, even
>>worst the server don't respond anything.  The second time it happened
>>with the INVITE messages.  The weird thing is that the SER 
>>process were
>>still running. I don't know what could cause this problem, but my
>>question is : Is there a way to log information about the "internal
>>system process" to have a clue about what is happening?. I 
>>would really
>>appreciate any help. Thanks
>>
>>
>>Ricardo Martinez.-
>>
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>>    
>>
>
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