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What is the purpose of the events block in NGINX?

The events block, placed at the top level of nginx.conf alongside http, controls how NGINX handles network connections at a low level rather than how it processes HTTP requests.

events {
    worker_connections 1024;
    use epoll;
    multi_accept on;
}

worker_connections sets the maximum simultaneous connections each worker process can hold open. use selects the OS-level connection method, such as epoll on Linux, which is what makes NGINX's event loop efficient at scale.

Because it governs connection handling rather than a specific protocol, the events block only ever appears once per configuration and applies globally.

What does the events block primarily configure?
How many times can the events block appear in a valid NGINX configuration?

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