CPU heats ups

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Posts 16
Ralph A. Pontier | Forum Activity | Posted: Thu, Dec 20 2012 10:13 PM
I have a MacBook Air 13 running Mac OS X Lion, Version 10.7.5, purchased Sept. 7, 2011. After today’s update of Logos 5 Gold, every time I use Logos the fan starts running at full speed. The IStat Pro widget shows CPU usage at 77% and CPU temp at 94 C when Logos 5 is running. The Activity Monitor shows that the LogosIndexer is using up to 348% of the CPU (how is that possible?) and the LogosIndexer keeps running after I quit Logos 5. The only way to stop it is to restart the computer. No problems with the same program on my PC running Windows 7 Home Premium. What’s up? Ralph

Posts 2279
Andy | Forum Activity | Replied: Thu, Dec 20 2012 10:55 PM

Hi Ralph,

It seems, from the information you provide, that Logos is still indexing (if so, you will see the blue icon in the top right hand corner of the screen). Please let us know if you cannot see the icon (i.e. if you believe that Logos is not indexing).

I think that I have the same version of the MBA (I purchased mine January 2012). I find that, when indexing, the MBA runs hot. It is, in fact the only time the MBA does run hot.

The good news is that if all you have done is update L5 (rather than upgrade to L5), the indexing should not take too long.

If you shut down the MBA, the indexing will restart from the beginning. If you are concerned about the heat, I would leave the MBA in a well ventilated spot, charging, until indexing has completed.


Posts 1669
SteveF | Forum Activity | Replied: Fri, Dec 21 2012 8:18 AM

Ralph A. Pontier:
The IStat Pro widget shows CPU usage at 77% and CPU temp at 94 C when Logos 5 is running

Somewhere else on the Forum "Bradley" from Logos indicates that the indexer process really stresses out all of your hardware.

So much so, that some computers that are able to handle every thing else thrown at them, might then "show" or reveal weaknesses in hardware etc due to the extremely heavy load placed by indexing.

If allowed, Indexing will use all cores, and at a high level.

These results that you are seeing are therefore not out of the question--BUT if this heat inhibits the working of the computer you may need to make sure that your vents are clean of dust or even upgrade cooling fans (hard to do on laptop?). Also it might be best, if possible,  not to have any other software apps running while indexing is taking place.



Regards, SteveF

Posts 16
Ralph A. Pontier | Forum Activity | Replied: Fri, Dec 21 2012 9:07 AM

I did upgrade to Logos 5 a week ago but used it mostly on my PC.  I guess I had not run it on my MBA until yesterday.

This morning I put the MBA out in the garage where the temp is just above freezing and let it index to its heart's content.  I checked at a half hour and it was still going but CPU temp was 82 C (instead of in the 90's).  I checked at an hour and it was done indexing and CPU temp was around 40 C.

I can now run Logos 5 with no excessive fan noise and CPU temp and usage are in normal range.  Problem solved, I hope.

Thanks, Ralph


Posts 1669
SteveF | Forum Activity | Replied: Fri, Dec 21 2012 9:27 AM

Ralph A. Pontier:
 Problem solved, I hope.

Wonderful news!Big Smile

Regards, SteveF

Posts 235
Tom Geswein | Forum Activity | Replied: Fri, Dec 21 2012 9:32 AM

I had a similar problem a while back with my previous PC - when indexing, my CPU would overheat to the point of the computer shutting off.  I had to take the cover off and put a fan on it in order to complete the indexing.  My problem ended up being the CPU fan not being seated properly on the CPU - which led to me building a new PC...  Yes, the indexing process uses a lot of resources and stresses the CPU, so make sure all of your cooling vents are clear.  (Don't put your laptop on the bed or on a pillow where it won't have proper air flow - my family has a hard time understanding this sometimes...)

"It seems our problems solve themselves when we look beyond us to those truly in hell."  -  Beyond Our Suffering - AILD

Posts 3
Ken Collins | Forum Activity | Replied: Sat, Dec 22 2012 3:37 AM

Sometimes my PC fan runs real hard in Logos 5 when I have a note document open in a tab.  If I close the not tab or move it then the problem goes away.

Posts 181
Wesley Crouch | Forum Activity | Replied: Sun, Dec 23 2012 12:37 PM

I have a an HP Pavillion laptop and when it gets hot anywhere like that I get the cheep chill pad with one or two fans in it, I use for just such occurances. Plug it in put the laptop over it and keep the hotspot of my laptop over it, however the usse of a cold garage is a great idea if sticky fingers aren't around!


Posts 732
Bootjack | Forum Activity | Replied: Mon, Dec 24 2012 6:45 AM

Well - sticky fingers or light fingers. What a horrifying thought to go out into the garage and see if there has been a meltdown or not, and no laptop - only a hubcab left in the garage. One would want to leave the garage door locked unless the computer is spewing out too much fumes.   :-)

Posts 164
DivineCordial | Forum Activity | Replied: Wed, Dec 26 2012 5:47 PM


The reason LogosIndexer is recorded as using more than 100% is because it is using more than one processor core. Your Macbook Air has a dual core processor with hyper threading, thus giving it the equivalent of four logical processor cores. So the number could be potentially as high as 400% (100% times 4).

I just got a Macbook Pro Retina 13" i7 2.90GHz (my first Mac) and when I installed Logos the Indexer pushed the system the same way you described (using ~300% CPU and putting the temperature of each core at around 95C; occasionally one of the cores would hit as high as 101C). According to Intel the maximum processor temperature for this particular model is 105C.

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Posts 16
Ralph A. Pontier | Forum Activity | Replied: Wed, Dec 26 2012 9:40 PM

Logos should warn Mac lap top users that when they load a new program they should do it in a cool (low temp) environment.  Or maybe they already do and I missed the memo.


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Dave Hooton | Forum Activity | Replied: Thu, Dec 27 2012 1:16 AM

PC's are not under as much stress as I rarely see more than 50% when indexingCool


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Lynden Williams | Forum Activity | Replied: Thu, Dec 27 2012 2:48 AM

One users answer to the problem was to put it in the refrigerator. Not recommended.

Lynden Williams Communications

Posts 291
Bob Schlessman | Forum Activity | Replied: Thu, Dec 27 2012 5:02 AM

Dave Hooton:

PC's are not under as much stress as I rarely see more than 50% when indexingCool

I agree Dave. My laptop is an older dual-core Acer that tends to run fairly warm even under normal conditions. When I upgraded it to Logos 5 it handled the install and subsequent indexing without getting much hotter than with normal daily use. I never saw the CPU usage go higher than 45%.


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