Memory fragmentation and staff Mac OS X

What is the story on memory fragmentation in Mac OS X? I have frequently heard Mac OS X users claiming that they use their computers for days or weeks without restarting. Doesn't memory get fragmented in Mac OS X just like on any other computer? I find that my eMac starts getting sluggish after launching and quitting just a few programs. I have 768mb of memory.

Posted on Aug 28, 2005 8:04 PM

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7 replies

Aug 29, 2005 3:05 AM in response to Timothy Arends1

Hi Timothy,

Doesn't memory get fragmented in Mac OS X just like on any other computer?


No, because when it comes to defragmenting OS X does it on the fly (all files 20MB and under) - the ones that get fragmented the most. Also your Mac runs periodic maintanence scripts each morning between 3-5 AM to clean out caches. My current uptime is 22 days and only because I shutdown to install a UPS. No slowdown whatsoever.

I find that my eMac starts getting sluggish after launching and quitting just a few programs.


It shouldn't do that at all.

Create a new account, name it "test" and see how your apps work in that User acct? (That will tell if your problem is systemwide or limited to your User acct.) This account is just for test, do nothing further with it.

Open System Preferences > Accounts > "+" make it an admin account.

Let us know and we'll troubleshoot this further.

btw - do not even think about running a Norton utility on your Mac, you will hose your system for sure.

Aug 30, 2005 2:41 AM in response to Timothy Arends1

Hi Timothy,

Why would a new user account fix this???


Because there is a problem related specifically to your user (it's good news it's not systemwide).

To troubleshoot this log back into your normal user account:

1. Navigate to YourHome/Library/ Fonts - drag this folder to the desktop.
• Restart and test your applications.
• If they work start adding the fonts back few at a time.
( A likely suspects are Time RO & Helvetica Fractions, also if you do not use Classic you can trash the classic fonts.)

2. Check Preferences Thoroughly;
• Navigate to YourHome/Library/ Preferences drag this folder to the desktop.
• Restart and test your applications.
• If this works, save the old preferences folder somewhere else or on disk, name it "old prefs" .
** Note: A very important file is the " com.apple.Mail.plist" preference file located in the Preferences folder which contains all email account settings and general mail preferences (hold this one and replace if your problem is not with Mail).
You'll have to go through some of your System Preferences and apps to set the preferences back to how you like them. (Or if you have the time and inclination, "cherry pick" through until you find the problem one or two.)

3. Check Permissions Inside Home Folder
• Navigate to yourhome/library.
• Get Info (Command + i) on the "Applications Support" folder.
• Open the "Ownership & permissions" disclosure triangle.
• Make sure you are the owner, with "read and write" access.
• Click on "apply to all"
• If this is correct, open the "Applications Support" folder and do the same procedure (Command+I) for the folders with the names of the applications you are having trouble with.

Note:
The reason to check this is because repairing permissions with Disk Utility doesn't touch permissions inside your home folder.

If the isssue persists navigate to yourhome/library/ caches and drag this folder to the trash, then log out and back or restart. There is no need to replace this folder.

Good luck, let us know.

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Memory fragmentation and staff Mac OS X

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