Jake Bunce
Well-known member
However, I think memory is way more important than CPU. Especially in Lion. As nice Apple usually is, they simply do not have an idea how to handle with memory (Look at Jakes screenshot: 6 GB are inactive (usually blue in the graph) but instead of using inactive memory, OS X starts swapping, kinda stupid.)
Inactive memory is effectively free:
http://support.apple.com/kb/ht1342
Inactive memory
This information in memory is not actively being used, but was recently used.
For example, if you've been using Mail and then quit it, the RAM that Mail was using is marked as Inactive memory. This Inactive memory is available for use by another application, just like Free memory. However, if you open Mail before its Inactive memory is used by a different application, Mail will open quicker because its Inactive memory is converted to Active memory, instead of loading Mail from the slower hard disk.