Page-in & page-out

Discussion in 'Mac Basics and Help' started by Amad3U5, Jan 28, 2013.

  1. Amad3U5 macrumors member

    Nov 17, 2012
    I've googled it and can't seem to find a straight answer anywhere, I just want to make sure that this is correct:

    - A page-in is when the system temporarily caches some files onto the RAM
    - A page-out is when the system runs out of memory and uses the secondary storage as RAM

    Sorry for the inconvenience; just want to verify that this is correct.
  2. GGJstudios macrumors Westmere


    May 16, 2008
    Using Activity Monitor to read System Memory and determine how much RAM is being used

    The only thing you need to track is page outs, which are an indication that you're maxing out the RAM you have installed. To determine if you can benefit from more RAM, launch Activity Monitor and click the System Memory tab at the bottom to check your page outs. Page outs are cumulative since your last restart, so the best way to check is to restart your computer and track page outs under your normal workload (the apps, browser pages and documents you normally would have open). If your page outs are significant (say 1GB or more) under normal use, you may benefit from more RAM. If your page outs are zero or very low during normal use, you probably won't see any performance improvement from adding RAM.
  3. simsaladimbamba

    Nov 28, 2010

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