Mountain Lion 10.8.3: Dock shows 100%+ CPU in Activity Monitor
I upgraded my 'early 2008' MBP from 10.8.2 to 10.8.3 last week. Memory use seems to have increased with no real change in application usage — .CPU utilization seems similar, too. I have been watching Activity Monitor + vm_stat to see if I could identify any issues. I just noticed that the Dock process shows 100% CPU utilization in the detail section — even though the Activity Monitor summary stats show plenty of idle CPU cycles available. Swap activity is minimal — this all makes me question the validity and/or accuracy of the detailed stats shown in Activity Monitor. Any input or comment from the community?
TIA...
P.S. Activity Monitor screen shots are below. And no, I'm not running Parallels as per prior discussion https://discussions.apple.com/message/15596756#15596756 from 2011.
My $HOME/Library/Preferences folder contained only two com.apple.dock.* files:
com.apple.doc.plist w/current date timestamp
com.apple.doc.plist.KBPCAn with two-month old date timestamp
Detailed examination of the com.apple.doc.plist parameters seemed to be correct with nothing abnormal.
The killall Dock command suggested by Kappy seemed to address the 100%+ CPU at first, but then it returned.
Three consecutive full system shutdown/restart cycles seems to have eliminated Activity Monitor showing the Dock process running @ 100%+ CPU after 24+ hours of operation. No changes were made to the content of com.apple.dock.plist. My best guess at this point is that my system's Dock process may have had a memory leak-type issue that is neither traceable or reproduceable at this point.
The Activity Monitor issue variance (Dock process detail @ 100%+ CPU despite the summary record showing idle CPU cycles available) isn't explained. It seems to me that the sum of the detailed Activity Monitor records should match the summary pie chart information presented.
Thanks to Kappy for the input and suggestion. Further comment/discussion WRT the Activity Monitor issue is most welcome...
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