Sometimes the problem looks illogical. There is no sharp surge of visitors on the site, the traffic on the graphs does not hit the channel limit, the number of requests does not look catastrophic. But pages open slowly, some requests fail, the web server starts taking more memory, and the application responds every other time. In such cases, people often look for a heavy script, a database error, or a lack of resources on the plan. And that really does need to be checked. But there is one more scenario that is easy to miss: abnormal load through HTTP/2. In particular, an attack called HTTP/2 Bomb.
