[asterisk-users] Big difference in CPU utilization with MeetMe

[Kevin Ragsdale]

Hello everyone,

We are building a new * server based on a Supermicro motherboard with a 2.8 Xeon processor and a TE220B card.  We're using the PBX In a Flash distribution.  What we've found is that with a 4 user MeetMe conference, the CPU usage is consistently around 16%.  This in comparison to our existing PSTN gateway * box running 1.09 (it hosts our conferences and terminates our T1s).  With 23 users and processing all PSTN phone calls, CPU usage averaged from 3-8%.  This is an older Supermicro, with a 2.4 Xeon processor.  In both cases, the connections are via IAX trunks from our main PBX here, and in two remote locations.  We use g711 u-law only  - no other codecs are used.  If we connect the same number of users through a PRI connection directly to the new server, the CPU is 1% or less, so obviously we've pooched something.

We saw this same behavior when we split off the users to a 1.4x based PBX, and we thought it was the server hardware in the new machine, which was an older Dell 2650.  But now we're not so sure.  I know this is kind of vague, but can anyone suggest what might be happening?

New Server
CentOS 5, Kernel version 2.6.18-53.1.14.el5
Asterisk 1.4.19.1, and the SVN Zaptel drivers for the TE220B problems posted recently
2.8 Xeon, Hyperthreading disabled, 4GB RAM, 3Ware 9550SX RAID

Old Server
Fedora, Kernel version 2.4.22-1.2199.nptl
Asterisk 1.0.9
2.4 Xeon, Hyperthreading off, 1GB RAM

Thanks for the help,

Kevin



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