Page 1 of 2 12 LastLast
Results 1 to 15 of 16
  1. #1
    AlexN
    Guest
    The memory usage is ever increasing when downloading.
    I was downloading the Doom 3 demo which is about 450MB. I opened the Activity Monitor and noticed that the RAM-used is ever increasing. Once I finished downloading it, I only had 700MB free RAM. (before downloading, I had 1.1 GB free)

    Why?

  2. #2
    AlexN
    Guest
    Anyone noticed this issue?

  3. #3

    Avalon's Avatar
    Member Since
    Jun 25, 2004
    Location
    Luxemburg, Europe
    Posts
    1,779
    Specs:
    PowerMac G5 Dual 2GHz (June 2004), 2.5GB, Airport, black 5G iPod 30GB, white MacBook 2.0 2GB
    But that memory gets free again, no? So why bother?
    The system uses memory all the time, whatever it is doing (for example caching a download stream).

    As long as your system continues to run smoothly (which it definitely is with 700MB of free RAM!) there's absolutely no need to worry about memory usage.

  4. #4
    AlexN
    Guest
    Quote Originally Posted by Avalon
    But that memory gets free again, no? So why bother?
    No, it didn't. I noticed that first when I was downloading the XCode 2.1 from apple. Only 300MB RAM was free once the XCode was downloaded and mounted. Scary? no?

  5. #5

    Avalon's Avatar
    Member Since
    Jun 25, 2004
    Location
    Luxemburg, Europe
    Posts
    1,779
    Specs:
    PowerMac G5 Dual 2GHz (June 2004), 2.5GB, Airport, black 5G iPod 30GB, white MacBook 2.0 2GB
    Quote Originally Posted by AlexN
    No, it didn't. I noticed that first when I was downloading the XCode 2.1 from apple. Only 300MB RAM was free once the XCode was downloaded and mounted. Scary? no?
    Well, you just said it, the disk image was mounted. As it is a virtual disk, and in the case of Xcode 2.1 quite a big one, that's pretty normal.
    Virtual disks are mounted into memory, and take up memory as long as they are mounted.

  6. #6
    AlexN
    Guest
    Quote Originally Posted by Avalon
    Well, you just said it, the disk image was mounted. As it is a virtual disk, and in the case of Xcode 2.1 quite a big one, that's pretty normal.
    Virtual disks are mounted into memory, and take up memory as long as they are mounted.
    Oh, so .dmg files are mounted into memory? What if I only had 512MB RAM? I couldn't mount any files that are larger than 512MB?

  7. #7


    Member Since
    Jul 22, 2003
    Location
    Hamilton College
    Posts
    6,999
    Specs:
    20" iMac C2D 2.16ghz, 13" MacBook 2.0ghz, 60gb iPod vid, 1gb nano
    No it would just rely more on virtual memory
    Don't forget to use the new User Reputation System

  8. #8

    Avalon's Avatar
    Member Since
    Jun 25, 2004
    Location
    Luxemburg, Europe
    Posts
    1,779
    Specs:
    PowerMac G5 Dual 2GHz (June 2004), 2.5GB, Airport, black 5G iPod 30GB, white MacBook 2.0 2GB
    Quote Originally Posted by trpnmonkey41
    No it would just rely more on virtual memory
    Exactly. :cool:

  9. #9
    AlexN
    Guest
    Okay, just to make it clear. When there is enough physical memory, the .dmg file will be mounted into it? If it is, that's really cool.

    Wouldn't it be cool if one day, there weren't harddisk anyone, anything could fit into memory? Say, 500 GB of RAM? haha, some dreams...

  10. #10

    rs2sensen's Avatar
    Member Since
    Mar 20, 2005
    Location
    Michigan, USA
    Posts
    1,416
    Specs:
    1.67 Ghz 17" PB w/1 GB Ram; 400 MHz PM G4, 366Mhz iBook Firewire, Nano 4GB Black
    Quote Originally Posted by AlexN
    Only 300MB RAM was free once the XCode was downloaded and mounted. Scary? no?
    Not really, 300MBs is still a fair amount of ram. and if you needed more for another app, OS X would allocate it to it.

  11. #11
    AlexN
    Guest
    Okay, this is what I've discovered so far. It has nothing to do with the files being .dmg or not, virtural disk image doesn't mount in physical memory.

    No matter what kind of files you download, whether the browser is Safari or Firefox, the memory is ever decreasing. Try downloading a 500MB+ video file, it's the same.

    It's a bug, I can expect this be fixed in 10.4.3.

  12. #12


    Member Since
    Jul 22, 2003
    Location
    Hamilton College
    Posts
    6,999
    Specs:
    20" iMac C2D 2.16ghz, 13" MacBook 2.0ghz, 60gb iPod vid, 1gb nano
    It's not a bug. When downloading the incomplete parts of the file are stored in the RAM because they have to assembled together when the download is complete and stored on the hard drive
    Don't forget to use the new User Reputation System

  13. #13
    AlexN
    Guest
    Quote Originally Posted by trpnmonkey41
    It's not a bug. When downloading the incomplete parts of the file are stored in the RAM because they have to assembled together when the download is complete and stored on the hard drive
    Okay, but once the download is complete, the memory should be freed, no?

  14. #14


    Member Since
    Jul 22, 2003
    Location
    Hamilton College
    Posts
    6,999
    Specs:
    20" iMac C2D 2.16ghz, 13" MacBook 2.0ghz, 60gb iPod vid, 1gb nano
    It will be put into the Inactive category, which means that Safari will have priority but it is essentially free
    Don't forget to use the new User Reputation System

  15. #15
    AlexN
    Guest
    Quote Originally Posted by trpnmonkey41
    It will be put into the Inactive category, which means that Safari will have priority but it is essentially free
    Hmm...but the Activity Monitor says the memory left is only 300MB, and the GarageBand is much slower. Reset the computer, and it goes back to normal.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. increasing memory
    By gina_sena in forum Switcher Hangout
    Replies: 1
    Last Post: 09-11-2012, 01:00 AM
  2. Increasing RAM memory
    By thatom93 in forum Apple Notebooks
    Replies: 3
    Last Post: 07-05-2012, 07:21 AM
  3. Increasing Memory -
    By billwill in forum Apple Notebooks
    Replies: 12
    Last Post: 10-22-2011, 10:21 AM
  4. Help on increasing Memory in my iMac ...
    By rebldr in forum Switcher Hangout
    Replies: 7
    Last Post: 02-22-2011, 04:20 PM
  5. Increasing ram usage
    By Kalimero in forum Other Hardware and Peripherals
    Replies: 2
    Last Post: 10-25-2007, 04:06 PM

Posting Permissions

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