The errors are gone after I set the ulimit -n to 32786. The -x is unlimited. I found that AMI is very inefficient. During the time of issue a lot of AMI command, sip calls can't go into the asterisk box. I don't know if you guys have the same experience.
________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of James Texter Sent: Friday, September 21, 2007 11:19 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [asterisk-users] Asterisk 1.2.24 simultaneous call limits. What do you have ulimit -n and ulimit -x set to? Thanks, James Texter On Fri, 2007-09-21 at 08:51 -0400, Wai Wu wrote: I am not so sure if the interrupts has any thing to do with it. I run some more test just now and I am getting these error on the console of the call receiving machine. All it does is wait for 45 seconds. I think there is more can be done on the Linux configuration, but I just don't know what. Sep 21 08:42:30 WARNING[22820]: channel.c:565 ast_channel_alloc: Channel allocation failed: Can't create alert pipe! Sep 21 08:42:30 WARNING[22820]: chan_sip.c:2797 sip_new: Unable to allocate SIP channel structure Sep 21 08:42:30 NOTICE[22820]: chan_sip.c:10843 handle_request_invite: Unable to create/find channel Sep 21 08:43:03 WARNING[22820]: channel.c:565 ast_channel_alloc: Channel allocation failed: Can't create alert pipe! Sep 21 08:43:03 WARNING[22820]: chan_sip.c:2797 sip_new: Unable to allocate SIP channel structure Sep 21 08:43:03 NOTICE[22820]: chan_sip.c:10843 handle_request_invite: Unable to create/find channel -----Original Message----- From: [EMAIL PROTECTED] on behalf of Gordon Henderson Sent: Fri 9/21/2007 3:40 AM To: Asterisk Users Mailing List - Non-Commercial Discussion Subject: Re: [asterisk-users] Asterisk 1.2.24 simultaneous call limits. On Thu, 20 Sep 2007, Wai Wu wrote: > > Hi everyone, > > I am running into wall today with simultaneous call limits. I have two > Asterisk machines (fast 3GHz C2D with 2GB of ram). I tried to create a > lot of sip calls from one machine to the other by issuing AMI Originate > commands to one machine. The machine that makes calls plays a message > (demo-intruct) upon the other machine answer. The machine receives the > calls just waits for 40 seconds then hangs up. Throught the manager > connection, I was creating 10 calls per-second. I also have sip phone > registered with the calling machine. At around 150 to 200 calls. When I > call the machine that's making all the calls, most of the calls couldn't > go through. For the ones that went through, most of them will drop off > within seconds of the call. But here is catch. When I run 'top', the cpu > is idling 97%. My question is. Is there a limit on the number of > simultaneous calls Asterisk can handle? I know I have very fast systems. > Shouldn't they be able to handle that many calls? What is your take? 200 calls using g711 needs 16Mb/sec of network bandwidth - each way. (200 * 80Kbs) This is well within the limits of a 100Mb network interface. However it also needs 50 packets per second of 160 bytes + IP overhead each way, per call, so thats 20,000 packets/second, and that might well be the bottleneck for your system, not just in the hardware issues required to shovel that many packets over the various buses, but the Linux overhead of schedulling each of the 200 threads to take/send that data in real-time. You might want to run iperf on each machine with nothing else going and see just how many UDP packets of 160 bytes you can push between the machines before packet loss starts. Gordon _______________________________________________ Sign up now for AstriCon 2007! September 25-28th. http://www.astricon.net/ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Sign up now for AstriCon 2007! September 25-28th. http://www.astricon.net/ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
_______________________________________________ Sign up now for AstriCon 2007! September 25-28th. http://www.astricon.net/ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
