ITunes using 100 % of the processor

Hello,
I have Leopard 10.5.6 on the new MacBook with the actual iTunes. The problem I am having is that iTunes are taking 100 % of the processor even when there is not any song playing. Tryed to remove all the plugins but it does not make any difference.
My music collection is not so big. There are both MP3s and AACs.
Have no idea, what I can try or do.
Thanks.

I had (and sometimes still have) CPU usage issues, although I'm running iTunes from a Mac mini, which is likely less powerful than your MacBook.
I spent so much time trying to figure out the cause. I only knew that iTunes was the culprit from staring at Activity Monitor. One of the major causes of CPU usage in iTunes is Smart Playlists. If you have a large number of Smart Playlists that are set to Live Updating then iTunes will be very busy as it automatically populates those playlists when you make changes to your library.
Think about the Smart Playlists you have in your library and what Rules they use to build themselves. Then think about what activity in iTunes (playing a track? changing a genre?) would cause the contents of your Smart Playlists to change.
Another issue to look at is the location of your library files (not your music files). Is it on the same system iTunes is running from?
Jason

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I have run a procmon and i have discover that when the processor is 100%, the Internet Explorer process query the registry with those key to the infinite :
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14:21:54.1308273 IEXPLORE.EXE 7800 RegQueryKey HKU\S-1-5-21-854245398-789336058-725345543-8900_CLASSES\AppV\Client\Packages\E9C21601-2C25-4417-92E9-35A059B30C37\Versions\4679E4EB-4D2A-4D8F-9CB8-481E6FEFBC20 SUCCESS Query: HandleTags, HandleTags: 0x100
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ITunes eats 100% of the processor

Since yesterday evening (Still pre-iTunes 7.2) iTunes eats up 100% of the processor and won't respond anymore. When I force quit it and restart it, only seconds later (interacting with it or not) same thing happens.
I deleted the plists for iTunes and that helped yesterday evening, today I fired up iTunes - same behaviour.
Repairing disk permissions didn't help and there is no thing like "determing gapless playback". Disabling plug-ins/add-ons didn't help as well. I can't find anything in the logs.
I sampled the process with the activity monitor and I get:
Analysis of sampling pid 591 every 10.000000 milliseconds
Call graph:
100 Thread_0f07
100 0x3089
100 0x3162
100 0x24c33f
100 0x38182
100 0x24bc36
100 0x24b1c6
100 0x1b12ff
100 WaitNextEvent
100 WNEInternal
100 GetNextEventMatchingMask
100 RunCurrentEventLoopInMode
100 CFRunLoopRunInMode
100 CFRunLoopRunSpecific
100 TimerVector
100 0x32ff0b
100 0x32fb34
100 0x30f2c6
72 0x30c84e
70 0x2d1a1e
16 0x2d1907
16 0x2d1907
15 0x2d190c
15 0x2d190c
7 0x2d18da
4 0x2d121c
4 0x2d121c
1 0x2d1230
1 0x2d1230
1 0x2d1235
1 0x2d1235
1 0x2d1239
1 0x2d1239
7 0x2d1902
7 0x2d1902
6 0x2d1905
6 0x2d1905
4 0x2d1962
4 0x2d1962
3 0x2d191a
3 0x2d191a
3 0x2d195e
3 0x2d195e
2 0x2d18bb
2 0x2d18bb
2 0x2d195c
2 0x2d195c
1 0x2d18b6
1 0x2d18b6
1 0x2d18c6
1 0x2d18c6
1 0x2d18f5
1 0x2d18f5
1 0x2d1960
1 0x2d1960
1 0x2d1982
1 0x2d1982
1 0x2d1a11
1 0x2d1a11
1 0x2d1a26
1 0x2d1a26
25 0x30c884
15 0x2d1a85
9 0x2d1a1e
2 0x2d18da
1 0x2d121c
1 0x2d121c
1 0x2d1239
1 0x2d1239
1 0x2d18b7
1 0x2d18b7
1 0x2d18b8
1 0x2d18b8
1 0x2d18eb
1 0x2d18eb
1 0x2d1902
1 0x2d1902
1 0x2d190c
1 0x2d190c
1 0x2d191a
1 0x2d191a
1 0x2d1a1e
2 0x2d18b2
2 0x2d18b2
1 0x2d19da
1 0x2d19da
1 0x2d1a26
1 0x2d1a26
1 0x2d1a41
1 0x2d1a41
1 0x2d1a85
7 0x2d1aa5
2 0x2d12af
2 0x2d12af
2 0x2d1539
1 0x2d1256
1 0x2d1256
1 0x2d12ab
1 0x2d12ab
1 0x2d14f0
1 0x2d14f0
1 0x2d14fa
1 0x2d14fa
1 0x2d1505
1 0x2d1505
1 0x2d1a6b
1 0x2d1a6b
1 0x2d1a79
1 0x2d1a79
1 0x30c884
1 0x2d19d6
1 0x2d19d6
1 0x2d1a43
1 0x2d1a43
1 0x30c85f
1 0x30c85f
100 Thread_1003
100 pthreadbody
100 _apeagent
100 machmsgtrap
100 machmsgtrap
100 Thread_1103
100 pthreadbody
100 CAPThread::Entry(CAPThread*)
100 HALRunLoop::OwnThread(void*)
100 CFRunLoopRunInMode
100 CFRunLoopRunSpecific
100 machmsgtrap
100 machmsgtrap
100 Thread_1203
100 pthreadbody
100 0x325f09
100 0x235b0e
100 semaphorewait_signaltrap
100 semaphorewait_signaltrap
100 Thread_1303
100 pthreadbody
100 0x218812
100 CFRunLoopRun
100 CFRunLoopRunSpecific
100 machmsgtrap
100 machmsgtrap
100 Thread_1403
100 pthreadbody
100 select
100 select
Total number in stack (recursive counted multiple, when >=5):
5 pthreadbody
Sort by top of stack, same collapsed (when >= 5):
machmsgtrap 300
select 100
semaphorewait_signaltrap 100
0x2d1907 16
0x2d190c 16
0x2d1902 8
0x2d1905 6
0x2d121c 5
Sample analysis of process 591 written to file /dev/stdout
Sampling process 591 each 10 msecs 100 times
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I repaired now the HDD from the installation disc and did an archive and install, still the problem exists

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Itunes using 100% of CPU

In the last 6 months or so (and across at least two iTunes updates), whenever I launch iTunes it ends up using 100% of my CPU and basically hangs my PC until I can manage to stop the iTunes 32 process.
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Hello mjake7,
It sounds like iTunes is having performance issues when you launch it, and in particular when you are trying to sync a device. I would recommend the troubleshooting steps from this article named:
iTunes for Windows Vista, Windows 7, or Windows 8: Fix unexpected quits or launch issueshttp://support.apple.com/kb/ts1717
You will want to start with troubleshooting for 3rd party plugins that could be causing the issue, then move onto system wide vs user specific isolation with the next part of the article.
Start iTunes in Safe Mode
Open iTunes in Safe Mode to isolate any interference from plug-ins or scripts not manufactured by Apple.
Hold down Shift–Control while opening iTunes. You should see a dialog that says "iTunes is running in safe mode" before iTunes finishes starting up.
Click Continue.
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If you have the same issue while iTunes is in Safe Mode, proceed to the "Create a new user account" section. If you don't experience the same issue, follow these steps to remove third-party plug-ins.
Thank you for using Apple Support Communities.
All the very best,
Sterling

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Thinkpad R61 7733-1GU
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New owner of a 2011 13" Macbook Air, core i5 based.
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Cee Pee You, is a OS modification. Apple recommends that you un-install these prior to a OS update because Apple makes changes to the OS all the time which breaks programs like these.
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http://forums.macosxhints.com/archive/index.php/t-3616.html

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Hello! Thanks in advance for reading my question.
so, I updated iTunes to 11.0.0.63 on Windows, and the new layout looks nice, but iTunes no longer gives my total song count, memory footprint, and total play-time at the bottom of the window, the way it used to. I just want to know how to get that info back. Thanks so much!

Ctrl / or View > Show Status Bar should do it.
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tt2

ITunes using 100 % of the processor

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