kernel_task question

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I looked at the Activity Monitor and the largest user of memory on my MBP is kernel_task. It shows 582.4MB with 81 threads. Should I be concerned or are those numbers ok? I'm running 10.9.4 with 8gb of memory.
 
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Your Mac's Specs
21" iMac 2.9Ghz 16GB RAM - 10.11.3, iPhone6s & iPad Air 2 - iOS 9.2.1, ATV 4Th Gen tvOS, ATV3
No its not something you need to worry about. kernel_task is what manages your system like, management of multitasking scheduling, virtual memory, system input and output, and various communication routines between processes.
You have 8GB RAM, so you are ok, and the more Apps you open, and things you have running in the Menubar, the more it will be.
Mine is 900+mb and 111 Threads.
 
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Your Mac's Specs
2011 27" iMac, 1TB(partitioned) SSD, 20GB, OS X 10.11.6 El Capitan
That's actually quite low for normal use, and mine is presently around 1,000± MB, 87 threads. It's quite often quite a bit higher, but I don't worry about it and I also have 20GB RAM in my 2011 iMac running 10.9.5.

And BTW: you should have some Apple Software Updates available as well as a 10.9.5 update you might want to check on and do. ;)
 

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