Wowza Heap over 10GB?

Wowza Streaming Engine
1

I know the recommendation is that we do not exceed 10 GB allocated to Wowza in production due to GC concerns. I am running an g2.8xlarge box on AWS which has 64 GB of RAM, so I believe that I can go above 10.

This weekend I saw the heap get filled up and it caused performance issues. I run a small LAMP stack on this same server to take care of larger file moves into AWS, and it looks like that may have been the subject of a random attack (meaning not directed specifically at us). At this same time, I saw:

  • heap memory up to 80%+

  • network out exceeding 2 Gbps

So my question is this, can I set the heap memory higher and what should I do to limit the GC hit that is referenced? Is there somewhere I can trade the two off to get to a place where my Wowza server can make more effective use of the 64 GB of ram this machine has available.

Thanks,

Bob

2

Hi

The limitation isn’t as relevant as it was now that we recommend using the G1 (Garbage First) collector. With the older garbage collection (Concurrent collector) this was a real problem, however this can now be increased beyond 10 GB when using the G1 (Garbage First) collector.

To do this, you will need to edit the [Wowza-Install]/conf/Tune.xml file using a text editor.

A restart of Wowza Streaming Engine is required for the changes to take effect.

Regards,

Andy_E