I'm using fleet 3.5.1, and I have some servers behind the ALB and I wanted to know for how much hosts every server can handle?

Hi, @nick fury! The answer there is a little nebulous since it really depends on the server specs rather than Fleet itself. The short answer is "hundreds if not thousands, depending on your setup." Looking at the breakdowns in the reference architectures might give you some idea of how we generally recommend breaking things down.

for example for every server with 16 GB and 4 cpu