How much memory should a Ruby on Rails application consume?

Question

My Ruby on Rails application is consuming around 129 MB of memory.. is this normal?

I have around 3,000 unique visitors a day, i have no complex queries...

My users table has about 18k rows.

Answer 1

129MB doesn't seem too excessive to me, what I find more important is does that number grow over time?

if it does the problem is probably how much of your dataset you are loading into memory on a request

check out: http://www.engineyard.com/blog/2009/thats-not-a-memory-leak-its-bloat/

in breif: Instantiating too many active record objects is a place where rails app's memory footprint really grows.

If in a request, you were to iterate over all 18k users for some reason, and worse, iterate over all of their posts (or whatever associations you have), you'd be instantiating a ton of objects, which (should) get cleared after the request, but ruby doesn't give the memory back to the system after it has been alocated.