Welcome to MacTalk Australia

the largest Australian community for Apple discussions and topics

Join the discussions, Register Now!
Results 1 to 5 of 5
  1. #1

    Join Date
    Feb 2005
    Location
    Victoria
    Posts
    706

    Default

    Hi all,

    I have a 12" current model ibook (10.3.8), when i bought it i got an extra 256mb of RAM after reading everywhere that 256mb wasnt enough.

    Recently ive started using my ibook all day at work as well as at home, and i'm finding that after waking from sleep it takes a little while for things to get back to 'normal' speed wise....

    This has only started since i started user switching between my home and work profiles, i think it might have something to do with the fact that i have programs open in both profiles...and i might be maxing out the RAM....

    In most mac forums people seem to say that 512mb is the minimum RAM. I figure that running 2 profiles pretty much all the time probably doesnt fit into the 'standard behavour'...

    so my question is - what do you guys think, am i bogging down my little 1.2ghz G4 with too much to do, or am i a bit short on memory?

    if its the later, would replacing the 256, with a 512 be enough?

    Thanks,
    Z

  2. #2

    Join Date
    Jan 2005
    Location
    With a Wine glass in hand
    Posts
    1,789

    Default

    An easy way to check if you are maxing out your available ram is to open the "activity monitor" program that is located in your Utilities folder. Once open, click on the 'System Memory' tab down the bottom... if you are showing very blue & green, then you might want to think about moving up a stick of ram.

    I run 768mb on my iBook g4 1.2ghz and it still runs into the occasional ram slow-down...

    The simple answer will always be: more memory = better
    See wineweek.com.au for rapid tips on which wines are worth buying and drinking.
    Follow me on twitter: wineweek or uncyherb

  3. #3

    Join Date
    Feb 2005
    Location
    Victoria
    Posts
    706

    Default

    Thanks!

    I'm new to Mac's (switcher as @ the day after macworld ) so you'll have to bear with me!

    I've got 143mb inactive (Blue) and 11mb free (green)
    285mb active (yellow) and 78mb wired (red)...

    the 'Used' value is around 499mb.

    those valuse are changing when i switch desktops, i'd imagine thats normal....

    Ok so i'm guessing i'm running pretty close to the edge then?

    more = better!

  4. #4

    Join Date
    Feb 2004
    Location
    Sellicks Beach, SA
    Posts
    3,537

    Default

    Originally posted by zillatron@Mar 3 2005, 10:23 AM
    snip

    I've got 143mb inactive (Blue) and 11mb free (green)
    285mb active (yellow) and 78mb wired (red)...

    the 'Used' value is around 499mb.

    those valuse are changing when i switch desktops, i'd imagine thats normal....

    Ok so i'm guessing i'm running pretty close to the edge then?

    more = better!
    RAM usage under OS X is not like Windows at all (or the old OS 9.x for that matter). OS X constantly changes RAM allocation according to the demands at the time. You might find that even if you open up a couple more applications that the 'free' component won't change appreciably. It may either decrease or, paradoxically, increase (as shown in the example below)

    As an example I currently have 10 applications open and RAM usage is:
    wired 75 MB
    active 333 MB
    inactive 211 MB
    used 618 MB
    free 23 MB
    Virtual Memory (VM) 4.4 GB

    Now, I have also opened Photoshop AND a 32 MB image and now the activity monitor says this about RAM usage:
    wired 75 MB
    active 325 MB
    inactive 196 MB
    used 596 MB
    free 43 MB
    VM 4.72 GB

    So what happened? While I was opening images the OS decided to swap some inactive pages (4096 bytes each I think) to virtual memory; an increase of 320 MB but this has left me with more free physical RAM. After a while OS X does struggle to manage all this but what you really need to know is that more physical RAM allows the OS to swap fewer pages out to virtual memory and keeps these in physical RAM instead. The more data it can keep in physical RAM, the faster and more efficiently your machine will run. There is a limit to what you can have active or open at any one time and as you approach this limit, performance plummets. When it happens you'll know it.

    cheers, kim

  5. #5

    Join Date
    Feb 2005
    Location
    Victoria
    Posts
    706

    Default

    Very interetsing!

    >So what happened? While I was opening images the OS decided to swap some inactive pages >(4096 bytes each I think) to virtual memory; an increase of 320 MB but this has left me with >more free physical RAM.

    Half decent memory mangment is an unusual thing to see coming from a windows background
    espically in support where you are dealing with people opening more things than their PC can handle all day long...

    I tried something similar, i opened another 5 or so apps, then closed them. the amount of free RAM didnt change hardly at all. and i actually ended up with more than i started with after i closed them.
    I understand better what OSX is doing now, and the more = better thing makes more sense also.

    768mb is not going to hurt it thats for sure - and for ~160$ its a cheap 'upgrade'.

    Thanks for your informative posts!
    Z

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •