2 Replies Latest reply: Apr 7, 2009 2:14 AM by dave coyle1
dave coyle1 Level 2 Level 2 (240 points)
just downloaded a handy widget called iStat pro - lets you monitor every aspect of your system. It features 9 sections that monitor everything from cpu, memory and disk usage to which processes are using the most cpu.

I was just looking at the RAM part which stated the following

Wired - 492MB
Active - 141GB
Inactive - 30MB
Free - 2.08GB

I have 4GB of RAM installed. DOes this mean that the free RAM isnt used at all?

G5, Mac OS X (10.4)
  • 1. Re: iStat pro
    neuroanatomist Level 7 Level 7 (31,690 points)
    Free RAM is available to be used, but you're not using it (yet). The 'real' free RAM is the sum of free + inactive (which is RAM that was being used, but currently is not). See this link for a description of the relevant terms:


    Note that 4 GB is a lot of RAm, relatively speaking. My max is 2 GB, and even running several apps, including running Windows in a virtual machine (via Parallels), I still have >500 MB free. The Mac OS is very good at memory management.
  • 2. Re: iStat pro
    dave coyle1 Level 2 Level 2 (240 points)