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

**URL:** <https://community.wowza.com/t/load-spike-and-network-drop-out-during-connection-ramp-up/45042>\
**Category:** Wowza Streaming Engine\
**Created:** [April 2, 2015, 10:26am UTC](https://community.wowza.com/t/load-spike-and-network-drop-out-during-connection-ramp-up/45042 "2015-04-02T10:26:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![David\_Ripley](https://avatars.discourse-cdn.com/v4/letter/d/ecccb3/32.png) [@David\_Ripley](https://community.wowza.com/u/David_Ripley)\
**Post date:** [April 2, 2015, 10:26am UTC](https://community.wowza.com/t/load-spike-and-network-drop-out-during-connection-ramp-up/45042/1 "2015-04-02T10:26:12Z")

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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](https://www.wowza.com/docs/how-to-do-performance-tuning). 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.

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**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\
**Post date:** [April 16, 2015, 9:06am UTC](https://community.wowza.com/t/load-spike-and-network-drop-out-during-connection-ramp-up/45042/2 "2015-04-16T09:06:55Z")

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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 support@wowza.com 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,

Salvadore