Janus server crashes during videoroom demo

General
1

I am using Janus 1.2.0 version now.
I used the videoroom demo for a basic test, but the server is dying.
As for the test method, I opened about 10 chrome tabs on one PC and tested the videoroom demo.
Of course, the default setting is only available for 6 participants, but I changed the settings and tested it by modifying it so that up to 50 people can access it.
Then, as soon as about 10 tabs or more, the Janus server goes down and dies.
Up to 8-10 clients seems to work fine.

This time, instead of opening 10 tabs on one PC, even if I connect through multiple PCs, if there are more than 14 to 16 clients, the Janus server will die.

What I expected was that the Janus server would be alive even if the server forcibly closes the connection with the client.
This is because the server must be alive to reconnect the client and continue the video chat.

Is there anything else I need to do in the Janus server settings?

And I did the same test with janode. Again, when 10-12 clients connect, the Janus server crashes.

The Janus server was installed on Ubuntu 18.04, the server has 2 * vCPU, 8G RAM on AWS.

Thank you

2

There is one thing I can consider is using “ulimit” which I found it at the FAQs and with the additional setting , I can do it with more than 20 clients. However, the video is displayed on and off from about 9 clients.
So what I want to know is, besides settings like “ulimit”, it would be nice to have a guide on what parts to consider in order to use something practically.

3

Opening 10 tabs at the same time is the cause of the issue. Context here.