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Modernape

macrumors regular
Original poster
Jun 21, 2010
230
39
Since the update last week, my kernel_task now takes up at least 1.2GB of RAM, which is a huge increase from the 6/700MB it used to be. I'm wondering if this is specific to my machine, or are other retina owners seeing similar?

The only extensions that have been updated which might explain it are shown here:
 

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vatter69

macrumors 6502a
Feb 4, 2013
552
506
Always wondered what the kernel task is doing, let alone hogging up 1.4 gig (in my case)
 

leman

macrumors P6
Oct 14, 2008
16,515
14,008
I guess they are doing more aggressive caching now. Despite the higher kernel RAM utilisation, I still have no pageouts and the system feels snappier overall (this is on a 15" rMBP).
 

vatter69

macrumors 6502a
Feb 4, 2013
552
506
Ya no pageouts really here unless i start parallels and work heavy with the VM.
 

bill-p

macrumors 68030
Jul 23, 2011
2,752
1,277
For some reason, my usage seems to cause page outs more often lately...

iHPjfk2Dzz1Cd.png


But there is no adverse effect on performance (no lag, stutter), and I probably wouldn't have noticed it had it not been for Activity Monitor.
 

Modernape

macrumors regular
Original poster
Jun 21, 2010
230
39
For some reason, my usage seems to cause page outs more often lately...


But there is no adverse effect on performance (no lag, stutter), and I probably wouldn't have noticed it had it not been for Activity Monitor.

Wow - that's high, how long was your up-time at that point, what had you been running?
 

tharitm

macrumors 6502a
Nov 9, 2009
500
533
Same here! Non Retina 2012 Model though. I tried rebooting but no luck.
 

CausticPuppy

macrumors 65816
May 1, 2012
1,483
18
1.41GB for me. WTF?

I didn't check this before the 10.8.3 update so I don't know what it was previously.
 

leman

macrumors P6
Oct 14, 2008
16,515
14,008
For some reason, my usage seems to cause page outs more often lately...

But there is no adverse effect on performance (no lag, stutter), and I probably wouldn't have noticed it had it not been for Activity Monitor.

Have you started using some new software lately? If I am not mistaken, accessing memory-mapped files will also show up as page misses, even though they are often designed to work this way.
 

bobr1952

macrumors 68020
Jan 21, 2008
2,040
39
Melbourne, FL
My kernel has been over 1 GB since the update--currently 1.33--but it seems to me that some tasks have been reallocated as many of the other processes--like webprocess take up less RAM. Can't say I am using less RAM but I really don't see me using any more total RAM after the update. Doing my normal tasks and currently have 2.76 Free and 906 Inactive (out of 8GB). So in the end, all is good. :)
 

bill-p

macrumors 68030
Jul 23, 2011
2,752
1,277
Wow - that's high, how long was your up-time at that point, what had you been running?

I took that screenshot about the time I made the post. And current uptime says 2 days 19 hours... so I'd guess about 2.5 days.

I'd just been running the usual: Safari + Mail + Xcode + Skype + Photoshop + probably Preview as I had to look at some PDFs.

You can probably tell from the screenshot, but I already closed the heavy hitters (Xcode and Photoshop) by that time.

And Photoshop was open to edit a 1024 x 768 transparent PNG. Hardly something that would cause a multi-GB RAM usage spike.

Have you started using some new software lately? If I am not mistaken, accessing memory-mapped files will also show up as page misses, even though they are often designed to work this way.

Nope, nothing new. I haven't installed anything new on this computer for 2 months now.
 
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