[users@httpd] How is Apache Http Server architecture?

[anlex N <an...@gmail.com>]

How is Apache Http Server architecture?
I value your feedback very much

Nice to meet you, My name is anlex N <https://github.com/anlexN>.

I am a verified google maintainer of popular open source projects.

I am reviewing system-design-primer
<https://github.com/donnemartin/system-design-primer>. I can not find
"Apache Http Server architecture" docs in the Apache Http Server website.
Where can I find these docs?

By the way, system-design-primer just demonstrates NGINX architecture and
HAProxy architecture, Is Apache Http Server not better than NGINX and
HAProxy?

The Apache Http Server website says "event" (not "worker") mode supports
big scale. Is it OK?