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Lion slow response - seems disk related

I am getting very slow UI response in Lion. (iMac 27", 3 GHz, dual core i5 processor, 8 GB ram, 250 GB free on HD). SmartReporter says disk is operating in spec (ie no alarms). Opening disk folder takes 5 seconds to get a spinning beach ball, with another 5 or more seconds to get the folder open. Also slow on directory scan during file opening dialogs. Even get the delay when opening USB drives.


OS 10.7.3, with Apache running, and the usual load of extensions operating. But what I find irritating is that Activity Monitor reports CPU at 25 %, HD occassionally spiking to 100%, but not often, and still I seem to get these unexplained delays. Not fun. Turned off 'disk sleep' in energy saver preferences. Seemed to help for a while. Now not. Reinstalled OS X twice from store and with a USB download stick. Get wierd errors on Console: "5/6/12 5:20:31.000 PM kernel: IOSurface: buffer allocation size is zero".


Killing Safari/Flash via Activity Monitor makes a small amount of speed difference, but not much.


Any comments? Suggestions? Is this a general issue with Lion? Are there any profiling S/W diagnostics that might suggest where the processor is spending its time?


Nick

iMac, Mac OS X (10.7.3), slow UI response, slow disk

Posted on May 6, 2012 2:38 PM

Reply
28 replies

May 7, 2012 8:04 AM in response to Dave Calhoun2

Dave Calhoun2 wrote:


Yes, it is slower for that handful of users who use their computers for more than email. Why are you hanging out in the support forum if you won't even recognize there is a problem?

Lion is in daily use by millions of people who use it for more than e-mail. With any system that has this many users there are many who have issues. When taking the total number of Lion users into consideration and comparing that to the total number of reported problems here on Apple Support Communities, Lion is 100% problem free. All we do here is help fix the individual outliers.


If you have a specific problem with Lion, it would be best to start your own question and describe the problems you are having and your machine's configuration.

May 7, 2012 3:05 PM in response to Dave Calhoun2

So do you have a specific problem? Your posts so far are just letting off steam. Whatever your issue is it may be able to be addressed very easily. But we have no idea what it is. Many people who come here find that their issues with Lion are more than often self inflicted and often easily fixed. These same 'issues' have been raised everytime a new OSX has been released if you check previous forums. So basically start a new thread and give details of your problem or else continue working with a Mac that is action abnormally.


Cheers


Pete

May 7, 2012 4:04 PM in response to petermac87

Pete, I appreciate your viewpoint, I just don't agree with it. We have an OP saying Lion is slow. We have lots of other posts in this forum saying Lion is slow. I'm saying Lion is slow. You say Lion is fast. Yippee, you must be the correct one.


Btw, all my posts have not been about letting off steam. As far as I can tell you haven't contributed to the thread in any productive way at all. On the other hand I've offered advice on what I did to speed up Lion and what I plan to do in the future to make it even faster on my computer. So I would say my contribution far outweighs yours where you simply say there's no problem.


Shall we keep this up or let it go?

May 7, 2012 5:00 PM in response to Dave Calhoun2

Hi,


I believe the best solution is to look at your other startup items and see if some might be causing slowness. If you have a lot of startup items, it could cause Lion to be slow.


Also, you could try doing a back up and try to reinstall from scratch. I just did an upgrade from Slow Leopard to Lion on a white MacBook and it's faster.


Hope this helps.

May 12, 2012 9:18 PM in response to Linc Davis

Linc


I've been busy, but got back to this problem today. I read another article describing the WindowServer (ie the GUI driver) interacting with a video player I don't have, and just bogging down. It parallels your opinion, but a different explanation of the interactions. I got rid of three more video Codecs for Quitcktime (3IVX, DIVX, Flash) and rebooted, and the system is faster. That's mosty for the good but I had originally added the codecs to watch videos, in formats Apple's Quicktime doesn't support natively. So I've effectively reduced the usefulness of my system. There is a tradeoff fo any choice of configuration.


My last remaining issue is with Activity Monitor, which purports to describe the cycle level usage in the OS, but when all the processes add up to 20%, while the pizza delay icon is happening, I have to conclude that it is not properly interpreting the events in the OS. Maybe the WindowsServer is not being sampled - because "it's just there!" and there shouldn't be any extra overhead from it's operation.


Come on Apple! - Look into these S/W interactions. Maybe isolate the GUI S/W, and allow WindowsServer to get a maximum percentage of the CPU power. Limit tasks to something less than 100%. And give us a better tool than Activity Monitor to evaluate our low level software performance.


Nick

May 12, 2012 11:56 PM in response to Nick Radonic

Wahoo, I think I found the problem. When using disk utility to repair permissions it does not repair the home folder. You have to boot into a special program to do that. I followed the instructions at http://blog.chron.com/techblog/2011/09/want-to-really-repair-permissions-on-your -mac-try-this/ and after rebooting the difference was immediately apparent. I highly recommend you try this.


1. Restart Lion, and before you hear the chime, hold down the Command and R keys.

2. You’ll be at the Repair Utilities screen. Click the Utilities item in the Menu Bar, then click Terminal.

3. In the Terminal window, type resetpassword and hit Return.

4. The password reset utility window launches, but you’re not going to reset the password. Instead, click on icon for your Mac’s hard drive at the top. From the dropdown below it, select the user account where you’re having issues.

5. At the bottom of the window, you’ll see an area labeled Reset Home Directory Permissions and ACLs. Click the Reset button there.

Oct 15, 2013 9:32 PM in response to Nick Radonic

I had the same problem, and I'm happy to say that this thread helped rescue my ailing Mac. For me, the key was removing the Virtualbox drivers - uncovered by the kextstat command provided in this thread. As soon as I removed the Virtualbox drivers (using the uninstall command that comes with the Virtualbox dmg), my 2011 Mac was back to behaving like new. Thanks all for helping chase down a really thorny issue.

Lion slow response - seems disk related

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