I am trying to scale to 4000 concurrent connections on a ubuntu/apache box.
It is 8 core / 64gb ram, so it is not hitting memory or cpu, or any resources for that matter. The problem is with configuration. running on aws.
Serving a static file that says 'hello world';
What i have tried so far:
<IfModule prefork.c>
StartServers 500
MinSpareServers 2000
MaxSpareServers 4000
ServerLimit 5000
MaxClients 50000
MaxRequestsPerChild 10000
</IfModule>
It works perfectly until 1500 concurrent users, then every connection added after that fails or times out.
What else can i look at?