Java with 100% CPU

Wowza Streaming Engine
1

Hi Guys,

I’m new in this Wowza World.

So, I already need help :/… I’m using EC2 with Ubuntu and Wowza Server Trial License and it’s strange but the ‘java’ process is 95%-100% all the time.

When I use transcoder 160p and 360p the streaming keep freezing and play freezing and play.

Logs

Tasks: 64 total, 1 running, 63 sleeping, 0 stopped, 0 zombie

Cpu(s): 95.0%us, 4.3%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%st

Mem: 3840468k total, 502300k used, 3338168k free, 10492k buffers

Swap: 0k total, 0k used, 0k free, 97428k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

1644 root 20 0 2311m 284m 14m S 99.5 7.6 0:27.13 java

976 ubuntu 20 0 73540 1676 876 S 0.3 0.0 0:00.15 sshd

1655 root 20 0 17324 1228 940 R 0.3 0.0 0:00.08 top

Someone know what could be ?

Thanks

Kalz

2

Kalz,

What instance type?

Have you tuned it?

https://www.wowza.com/docs/general-tuning

Did you know about the pre-built AMIs here:

https://www.wowza.com/docs/pre-built-amis-amazon-machine-images

These are pre-tuned.

Richard

3

Kalz,

Yes, you can use the Trial license on a licKey AMI. The Transcoder needs as much as you can give it. Take a look at the Transcoder Benchmarks for reference.

Richard

4

What instance type are you using? Only the m1.medium has 3.7g ram, and that has 1 core. It’s not adequate for much transcoding. I would suggest, at minimum, using an m1.xlarge.

For larger instance types, you should apply tuning steps from step #9 of the Tuning Guide, which is not automated at present (it is a backlog item).

Richard

5

Thanks man,

So, I use the medium instace - on demand. I have used pre-built DevPay, but I need to test the transcoder addon.

Could I use the trial license key in pre-built AMI LicKey ? What do you suggest ?

Thanks a lot

Kalz

6

Richard,

Thanks a lot.

I signed the Lickey with Amazon EC2.

The freezing never more, but look this…

Tasks: 66 total, 1 running, 65 sleeping, 0 stopped, 0 zombie

Cpu(s): 95.4%us, 4.0%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%st

Mem: 3844592k total, 2051876k used, 1792716k free, 28768k buffers

Swap: 0k total, 0k used, 0k free, 424248k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

28423 root 20 0 4372m 1.4g 14m S 99.7 38.9 12:41.44 java

97 root 20 0 0 0 0 S 0.3 0.0 0:01.21 kworker/0:1

28863 ec2-user 20 0 106m 1756 752 S 0.3 0.0 0:00.04 sshd

Java process is 95% again…so strange.

I enable transcoder with transrate for H264 using 160p and 360p, just one camera stream.

My CPU / Mem

Intel® Xeon® CPU E5-2650 0 @ 2.00GHz

3.7GB memory

Do you suggest tuning the wowza? I think its strange for one camera in rtsp.

7

Thanks Richard

I signed a large instance with High CPU, no freezes anymore.

I’ll try all of your tips.

Thanks a lot for help.

Kalz