Softswitch performance

The number of simultaneous calls is limited only by the capabilities of your machine.

It is important to note that simultaneous calls depend on the hardware you are using.

2009.02.10 231 sim. calls alaw-g729 reencoding

• alaw2g729 stress test 231 calls

2009.02.10 645 sim. calls SIP pass-through

• SIP pass-through test 645 calls

2009.02.10 597 sim. calls SIP -> H323

• SIP2H323 pass-through test 597 calls

2009.02.07 550 sim. calls H323 pass-through

• H323 pass-through test 550 calls

2008.03.01 1575 simultaneous calls (2049 channels)

• 2 x Quad-Core Xeon 5300 "clovertown"
• 4 Gb RAM
• Debian 4.0
• 2.6.18-5-amd64 #1 SMP Tue Oct 2 20:37:02 UTC 2007 x86_64 GNU/Linux
• Asterisk 1.4.15
• canreinvite=no*
• ~15% calls with transcoding (~85% calls no transcoding)
• CPU busy 83% (17% idle)
• Comments:
  • Why channels/2 != calls?
  • Because not all of them were connected
  • and when the system is loaded the channels stats update slow
  • in that day we got to almost 3500 cc
  • when you have a lot of invites, the system gets very slow
  • we got to 220 setup calls per second
  • and the system was very heavy
  • in that load, your app was very good, however mysql become the bottleneck
  • so i had to tweak it a little bit, but we already talked about it.
  • With your app, from the time we installed, we already did more then 30M minutes.
  • This setup can handle around 4k cc easily, with no high rate cs per second

2008.02.18 906 simultaneous calls (1801 channels)

• 2 x Quad-Core Xeon 5300 "clovertown"
• 4 Gb RAM
• Debian 4.0
• 2.6.18-5-amd64 #1 SMP Tue Oct 2 20:37:02 UTC 2007 x86_64 GNU/Linux
• Asterisk 1.4.15
• canreinvite=no*
• ~15% calls with transcoding (~85% calls no transcoding)
• CPU busy 58% (42% idle)

2008.05.10 834 simultaneous calls

• Debian Etch

uname -a
Linux cl-t041-080cl 2.6.18-6-686-bigmem #1 SMP Sun Feb 10 22:21:07 UTC 2008 i686 GNU/Linux

cat /proc/cpuinfo
8 x Intel(R) Xeon(R) CPU           E5405  @ 2.00GHz
cpu MHz         : 2000.190
cache size      : 6144 KB

cat /proc/meminfo
MemTotal:      6229536 kB

asterisk -vvvvR
Asterisk 1.4.18.1, Copyright (C) 1999 - 2008 Digium, Inc. and others.

module show like mor
app_mor.so                     MOR Billing Solution v0.6.0              0

2008.01.17 637 simultaneous calls (1274 channels)

• 2 x Quad-Core Xeon 5300 "clovertown"
• 4 Gb RAM
• Debian 4.0
• 2.6.18-5-amd64 #1 SMP Tue Oct 2 20:37:02 UTC 2007 x86_64 GNU/Linux
• Asterisk 1.4.15
• canreinvite=no*
• no transcoding
• CPU busy 10% (90% idle)

2008.01.17 608 simultaneous calls (1215 channels)

• 2 x Quad-Core Xeon 5300 "clovertown"
• 4 Gb RAM
• Debian 4.0
• 2.6.18-5-amd64 #1 SMP Tue Oct 2 20:37:02 UTC 2007 x86_64 GNU/Linux
• Asterisk 1.4.15
• canreinvite=no*
• CPU busy 6.7% (93.3% idle) no transcoding
• CPU 30-35% with transcoding

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• canreinvite=yes means that voice traffic goes from client to provider, directly bypassing the MOR system.

How can I increase the number of simultaneous calls?

Simplest way to increase number of simultaneous calls is to connect additional Asterisk server to your current MOR server.

Other implementations which can help you to increase number of simultaneous calls can be found here.