Are Apache and MySQL multithreaded applications?

Question

I was wondering if the default installations of Apache and MySQL on Windows/Linux are multithreaded or not?

Answer 1

It depends on how to look at it.

MySQL allows you to run multiple threads at the same time (this comes to available CPU/RAM resources), but it won't allow you to run a single query using multiple threads.

Apache is multithreaded, this is the only way how the web application server could respond to multiple requests from different clients.

Answer 2

Yes, Apache and MySQL multithreaded.

By the way, they run as a single process on the server.