I was wondering: Node uses event loop architecture. I connect to my oracle RDBMS via knex and query the DB with each request. Since oracle doesn't have reactive drivers, can the event loop architecture handle a production scale amount of requests? In any case, whether yes or no, how is it different from reactive drivers like mongo offers?
The Node.js driver for Oracle Database is completely asynchronous/non-blocking. All of its async operations are done using Node.js' thread pool so as not to block the main thread. You might find this recent talk I did interesting (it's my latest attempt at explaining a lot of this stuff): Understanding Asynchronous Processing and Patterns in Node js.
Also, I recently started a series on building a REST API with Node.js on Oracle Database. The part on Database Basics touches on some of this too.