[Freeswitch-users] high load with ~200 fax calls despite low CPU utilization and low IO wait

[BookBag]

I'm running freeswitch also on a vm running centos 6.3 with fusionpbx. I
can vouch for the sluggishness. What I did is expand the memory. Try
expanding the memory to 4gb it should help but unfortunately if your on vm
your always going to get sub par performance.
On Aug 9, 2012 4:58 PM, "Adam Johnston" <ajohnston at blimessaging.com> wrote:

> Hi all,
>
> My FreeSWITCH setup works as follow: I have a service that launches and
> monitors faxes (via event sockets) on one of a few FreeSWITCH instances.
> These FreeSWITCH instances are running on dual-core, 2ghz CentOS 5.8 and
> CentOS 6.0 VMs. The issue is that once I get to ~200 simultaneous faxes on
> any one FreeSWITCH VM the load average shoots up (typically ~30, although
> I've seen it get much higher) and the VM becomes sluggish and occasionally
> unusable.
>
> top and sar output confirms that CPU utilization is pretty low, as are IO
> wait and RAM usage.
>
> I'm using a git head from 2012-02-06, although I see the same problem if
> update to a more current head. On the most recent head I tried (2012-08-06)
> the issue is worse, and crashes with a backtrace similar to this Jira,
> http://jira.freeswitch.org/browse/FS-2893 despite my compiling Lua and
> including the FreeSWITCH bindings.
>
> These issues occur on both the CentOS 5.8 and 6.0 VMs. I'm in the process
> of loading 5.8 onto a physical machine and testing there. It's also worth
> nothing that this load issue does not occur when I launch faxes from a
> script on one of the VMs.
>
> Has anyone else seen similar high load issues before?
>
> Many thanks,
> Adam Johnston
>
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