Any ideas? Odd things when stress testing Airtime/Icecast
  • Vote Up0Vote Down John ChewterJohn Chewter
    Posts: 899Member
    I ran the Icecast stress test on a dedicated Ubuntu 12.04 server with a gigabit switch.

    In Airtime, the listener's count graph rises until 255 listeners and flatlines at 255. However, status.xml shows like 333 and rising..
    I can do this on three streams at the same time - they all flatline at 255 - showing a total of 765
    Meanwhile the status.xml continues to rise until about (???) 1024 listeners when no further connections can be made - any connected players continue to play.
    Max connections in icecast is set to 14,000
    Anybody got any ideas as to where to look for these limits? I have been seeking everywhere and it all looks sensible?

    No longer using Airtime or Libretime.
  • 4 Comments sorted by
  • Vote Up0Vote Down Roger WilcoRoger Wilco
    Posts: 784Banned
    Guessing you followed that guide I posted in another thread? Which version of Icecast are you attempting to use? What's up with your RAM and CPU usage? Why not use Debian btw? :)
  • Vote Up0Vote Down John ChewterJohn Chewter
    Posts: 899Member
    RAM @ 11% CPU @ 19%
    Virtual memory used = 0
    It must be some connection limit somewhere - probably the same in Debian
    Icecast 2.3.2
    16GB RAM. Quad Core utter bastard warp-factor 6 processor. Phasors on stun.



    Post edited by John Chewter at 2015-01-13 16:15:22
    No longer using Airtime or Libretime.
  • Vote Up0Vote Down John ChewterJohn Chewter
    Posts: 899Member
    This seems the same thing. MBUFS limit reached? I am on the recommended Ubuntu 12.04.
    The solution seems to be recompiling the kernel with a higher value. But I would expect to find many folks screaming about this and icecast.
    One guy switched to Shoutcast and managed to get nearly twice as many connections without other changes.
    http://icecast.imux.net/viewtopic.php?p=20835&sid=dc33124d6c7589257102271d2885cad6

    Post edited by John Chewter at 2015-01-14 04:30:09
    No longer using Airtime or Libretime.
  • Vote Up0Vote Down Roger WilcoRoger Wilco
    Posts: 784Banned
    Not all gigE switches are created equal. Some can't even handle hundreds let alone thousands of concurrents. Give it a try on a cloud server with true 1 or 10gbps connectivity. And for dogs sake, use Wheezy. Icecast 2.4 was backported. Good luck!
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