Site on a bunch of Nginx + FPM + MySQL . The point is not in the database, I have already logged, and corrected the shortcomings through the tuner.
Every 5-10 minutes when entering any page of the site, it hangs for about 3 seconds (spinner in the tab and white background). After this hang, everything flies as it should.
Note: Before this was Apache 2 and there was the same problem. After a complete reinstall of Ubuntu, the problem remained.
What can be wrong? How to track and how to fix?
Upd: It seems that the browser resets the cache and the site starts to load from scratch, as when you first visited.
