[Freeswitch-users] Jitter and dropping MOS score

Christoph Russow russow at emtex.de
Tue Oct 5 09:33:42 UTC 2021

Hi all,

we are currently experiencing jitter and dropping MOS score on an 
increasing amount of calls on our system.

i can't see any increased load on our system (neither CPU nor I/O wise).

Current stats:

~ 15Mbit/s network traffic (on a 1Gbit/s network)
load average: 1,10, 0,82, 0,91 (16 core machine)
memory used: 2,26GB/16GB

freeswitch at lc1> status
UP 0 years, 12 days, 13 hours, 30 minutes, 24 seconds, 649 milliseconds, 
831 microseconds
FreeSWITCH (Version 1.10.1 -release-12-f9990221e6 64bit) is ready
137634 session(s) since startup
218 session(s) - peak 245, last 5min 222
1 session(s) per Sec out of max 30, peak 8, last 5min 2
1000 session(s) max
min idle cpu 0.00/95.37
Current Stack Size/Max 244K/244K

System ist not virtualized.

the only "strange" thing i see is the freeswitch "main"process that 
consumes (according to htop) >=100% cpu (see attached screenshot).
Can this be the problem? if yes what can i do against it.

if not what are possible bottlenecks i should weed out?

if you need any additional informations to help me sort out this problem 
please don't hesitate to ask.

Thanks in advance and best regards


Christoph Russow
Software Engineer

Bischof-Otto-Weg 9
D-91086 Aurachtal
                           Geschäftsführer:       Markus Enzinger
Tel. +49 9132 7490 0      Sitz der Gesellschaft: 91086 Aurachtal
Fax. +49 9132 7490 900    Amtsgericht Fürth:     HRB6804
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