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More pageins than pageouts?
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Junior Member
Join Date: Jul 2006
Status:
Offline
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According to OS X, I have more than 30,000 pageins but no page outs. Does this even make sense? How can you page something in that you haven't paged out to begin with?! Any ideas?
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Clinically Insane
Join Date: Oct 2001
Location: San Diego, CA, USA
Status:
Offline
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All data is on your disk to begin with. It's normal to have more pageins than pageouts. For instance, I have 47615 pageins and 2879 pageouts.
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Chuck
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"Instead of either 'multi-talented' or 'multitalented' use 'bisexual'."
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Fresh-Faced Recruit
Join Date: Jan 2007
Status:
Offline
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No pageouts is a good thing 
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Senior User
Join Date: Nov 2005
Status:
Offline
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Paging in and out is simply swapping older data from physical memory (RAM) to the hard drive (the swap file I believe) to make room for new data that the processor wants to access immediately.
Example: You have 64K of RAM on your computer. You load up your 48K program and it runs. In the course of running, it generates data that is saved to RAM. Eventually you may run out of RAM for more data, so old data in memory is dumped to virtual memory on the hard drive--it is "paged out" to the hard drive. Now, when your program needs to manipulate the data that was paged out or run program code that was paged out, older code/data is paged out and the current program code/data is paged back in.
Take a look here to get a better explanation:
Virtual memory - Wikipedia, the free encyclopedia
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Mac Elite
Join Date: Jun 2000
Location: If I tellz ya, then I gotsta killz ya !
Status:
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Originally Posted by Trans Velvet 
No pageouts is a good thing
'Tis da best thing !
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Signatures are ugly. Bitchy women are ugly......YOU do the math :)
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Mac Elite
Join Date: Jun 2000
Location: If I tellz ya, then I gotsta killz ya !
Status:
Offline
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Signatures are ugly. Bitchy women are ugly......YOU do the math :)
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Senior User
Join Date: Mar 1999
Location: Akron, OH
Status:
Offline
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Never argue with an idiot. They'll drag you down to their level and beat you with experience.
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Junior Member
Join Date: Jul 2006
Status:
Offline
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Aha, I get it, thanks folks!
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Junior Member
Join Date: Jul 2006
Status:
Offline
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Also, one slightly related question, why would the free memory shown in MenuMeters be higher than that shown in Activity Monitor?
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Mac Elite
Join Date: Aug 2001
Status:
Offline
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MenuMeters shows free + inactive, iirc.
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