Wowza Community

High CPU Utilization & Response Time on Wowza Server

We are facing very high response time in delivering the chunks ( Chunk Size 6 sec) to requested server. Whenever there is request/network utilization on Wowza server for more than 2.5 -3 Gbps, response time increases to 20-30 sec and when utilization is less than 2 Gbps , response time is less than 1 sec . At same time CPU Utilization increases from 10 % to 70% . And most of CPU is consumed by java process.

We are using HP DL 380 Gen 8 with 192 GB RAM and CPU 48 Cores. Network Interface is of 20 Gbps bonding.

OS is CentOS 6.5 with Kernel Version 2.6.32-431.el6.x86_64.

Wowza Version : 4.2.0

We are using Wowza for VOD Content Streaming into HLS.


Have you already run through the tuning guide?

Performance Tuning Guide

The latest installers starting with 4.2.0 include a tuned version of Java but if the installation but with a system that has a large amount of CPU cores like this, it may still be helpful to run through the manual tuning instructions.

Best regards,


Hy anish. Did you find any solution to your problem? I also have high spec server, 24 cpus, 24gb ram, 20gbps nic. But then traffic goes beyong 2gbps, streams start to pixelate. Cpu utilization of single cpu reaches 90% and other 23 cpus are under 20%. Done all the tuning steps mentiined by wowza articles but in vain. Any help pls