ulimit -c unlimited # The maximum size of core files created. ulimit -d unlimited # The maximum size of a process's data segment. ulimit -f unlimited # The maximum size of files created by the shell (default option) ulimit -i unlimited # The maximum number of pending signals ulimit -n 999999 # The maximum number of open file descriptors. ulimit -q unlimited # The maximum POSIX message queue size ulimit -u unlimited # The maximum number of processes available to a single user. ulimit -v unlimited # The maximum amount of virtual memory available to the process. ulimit -x unlimited # ??? ulimit -s 240 # The maximum stack size ulimit -l unlimited # The maximum size that may be locked into memory. ulimit -a # All current limits are reported.
Recommended SIP settings
- Turn off every module you don't need that is not also needed by FreeSWITCH
- Turn presence off in the profiles
- libsofia only handles 1 thread per profile, so if that is your bottle neck use more profiles
- mod_cdr_csv is slower than mod_xml_cdr
- Reports of running more than a single instance of FreeSWITCH has helped.
- Disable console logging when not needed - loglevel 0
Ethernet Tuning in linux
Prior to the bufferbloat guys coming in and talking to us there was a note in here that one should "set the buffers to maximum." That advice is WRONG on so many levels. To make a long story short, when you're doing real-time media like VoIP you absolutely do not want large buffers. On an unsaturated network link you won't notice anything, but when you have a saturated network the larger buffers will cause your RTP packets to be buffered instead of discarded.