RAM indicator...

Discussion in 'macOS' started by MIDI_EVIL, Feb 25, 2006.

  1. MIDI_EVIL macrumors 65816

    MIDI_EVIL

    Joined:
    Jan 23, 2006
    Location:
    UK
    #1
    Hi,

    Using activity monitor to check my RAM usage, i noticed these...

    Wired
    Active
    Inactive
    Used

    Can somebody please tell me what they mean. Obviously Used is how much RAM my computer is using but the others i'm unsure of.

    Thanks.
    Rich.
     
  2. eva01 macrumors 601

    eva01

    Joined:
    Feb 22, 2005
    Location:
    Gah! Plymouth
    #2
    searching the forums is fun and searching the guides is fun as well ^______^
     
  3. iGary Guest

    iGary

    Joined:
    May 26, 2004
    Location:
    Randy's House
    #3
    Oh come on now Eva. ;) :rolleyes:

    Used is the total being "used."

    Inactive means nothing is using it.

    Active and wired are part of the total used - wired is being used by a program, but can be given up to another program if the OS calls for it, AFAIK. Active is in use.
     
  4. MIDI_EVIL thread starter macrumors 65816

    MIDI_EVIL

    Joined:
    Jan 23, 2006
    Location:
    UK
    #4
    Thanks guys,

    Eva, was your post really that necessary ?

    Thanks again,
    Rich.
     
  5. eva01 macrumors 601

    eva01

    Joined:
    Feb 22, 2005
    Location:
    Gah! Plymouth
    #5
    yes it was necessary because i see the exact same question posted about twice a week
     
  6. iMeowbot macrumors G3

    iMeowbot

    Joined:
    Aug 30, 2003
    #6
    And then, in real life:

    Wired memory is memory that has been reserved at the system level. No other process is allowed to touch it, it cannot be swapped out to disk. It's for critical processes like device drivers that can't afford to have their memory borrowed.

    Active is memory allocated by ordinary processes. It is either being used right now or has been used in the recent past. The system will avoid swapping this memory out to disk if at all possible.

    Inactive memory is just like active memory, but it's been a while since any process has touched it. Because it's not seeing a lot of action, it is considered relatively safe to swap it out to disk without dramatically affecting performance. If there is not enough free memory out there and a process asks for more, this is where it will come from.

    Free memory is RAM that no process has claimed. It's totally up for grabs.

    Used is just the sum of wired, active and inactive. Used plus free is the total installed RAM.
     
  7. MIDI_EVIL thread starter macrumors 65816

    MIDI_EVIL

    Joined:
    Jan 23, 2006
    Location:
    UK
  8. iGary Guest

    iGary

    Joined:
    May 26, 2004
    Location:
    Randy's House
    #8
    He didn't ask about that. :p :D
     
  9. crazzyeddie macrumors 68030

    crazzyeddie

    Joined:
    Dec 7, 2002
    Location:
    Florida, USA
    #9
    Best summary I've ever seen. I really hope thats in the Guides.
     

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