June 2026
Intermediate to advanced
626 pages
13h 22m
English
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14
Monitoring and Observability
In the previous chapter, we deployed our application to production. We added health check endpoints, structured logging, and graceful shutdown. The application is live, users are connecting, and everything seems fine. But how do you actually know that it is fine?
Right now, the only way to find out if something is wrong is when a user complains or when a health check fails. By then, the damage is already done. What if you could see inside your running application, follow a single request as it travels from the browser through Express into Prisma and down to PostgreSQL, and spot the slow query before it becomes a timeout?
That is what this chapter is about. We will start by understanding the difference between monitoring ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.