I'm hosting about 300 domains for my clients on a single Apache server. They all don't have much traffic, so the server load is not a problem.
Theoretically there should be no limit how many of such low traffic domains I can have on the server, but I'm worried that if I have too many domains on the server, the sheer list of domains to check for each incoming request will slow Apache down.
Is there a rule of thumb how long an Apache config can be and how many different domains it can handle without an issue? Are 500 ok? 5000?
Clarifying: I'm not asking about how much traffic a server can handle. I know this specific server can handle at least twice the amount of its current traffic. I want to know if the number of domains is a critical factor or not.