Limited Websocket connections with mod_proxy

["Edward J. Yoon" <edwardyoon@xxxxxxxxxx>]

Hi,

I've installed Apache2 on Unbuntu 18.04, and enabled {a2enmod rewrite
proxy proxy_http proxy_wstunnel proxy_balancer lbmethod_byrequests}
modules.

And then, I've configured like:
https://github.com/edwardyoon/Heimdallr#getting-started

According to my benchmark using tsung tool, each backend server can
handle 60k websocket connections. But, I can made only 150 connections
to Apache2 load balancer that have 4 backend server.

What can I do fix this? My websocket server address is ws://52.78.219.149/1.

Thanks.
-- 
Best Regards, Edward J. Yoon

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