Results 1 to 2 of 2

Thread: load spike and network drop-out during connection ramp-up

  1. #1
    Join Date
    Apr 2015

    Default load spike and network drop-out during connection ramp-up

    We see a consistent issue where there's a transient load spike on the server while the incoming connection count is ramping up; when we hit about 500 incoming connections, the load average on the box hits around ~200, and CPU goes to ~100% (all in system; no iowait or user) and the network throughput drops out, causing issues for viewers. User memory rises a little during these few minutes, but then returns to normal. After about 10 minutes, everything settles down, and the connection count keeps going up without any problems at all; we can comfortably accommodate ~1200 users, saturating a 1Gb/s connection, and the server is basically coasting - load average is <1, plenty of free memory.

    Basically, everything is awesome apart from those few minutes during ramp-up. Has anyone seen this? Any advice on how to avoid it? My guess is that it's new threads being spun up to accommodate more connections, but I am not a java expert and am not sure how to test this hypothesis.

    Linux; WowzaMediaServer-3.6.3; 64-bit RHEL 6; java version "1.7.0_17"; 16GB RAM; 8 physical cores; hyperthreading disabled; Wowza is tuned according to the best practices outlined here. Aside from this one issue, everything is rock solid and pretty much completely maintenance free, Wowza just sits there doing its job awesomely.

    Thanks in advance for any suggestions.

  2. #2


    Hello there and welcome to the Wowza support forum.

    If you would be so inclined, the next time you see this happen, please zip up your /conf and /logs folders and send them to to open a ticket.

    The support team will have a look and see if they can pinpoint the issue and a possible solution.

    Kind regards,


Similar Threads

  1. Wowza Load Balancing and Media Cache in our network
    By gcowie in forum AddOn: Other AddOns
    Replies: 4
    Last Post: 06-11-2013, 08:30 AM
  2. Load Balancer AddOn not redirection connection
    By slouli in forum AddOn: Other AddOns
    Replies: 3
    Last Post: 02-19-2013, 03:57 PM
  3. Replies: 0
    Last Post: 01-24-2013, 10:59 AM
  4. Replies: 3
    Last Post: 11-25-2011, 05:35 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts