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10-17-2004 04:32 PM
10-17-2004 04:32 PM
swapping vs. paging
What is difference between "page out rate"/"swap out rate" and "page in rate"/"swap in rate"
Thx
Sanjeev Gupta
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10-17-2004 04:40 PM
10-17-2004 04:40 PM
Re: swapping vs. paging
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=135098
HTH.
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10-17-2004 04:42 PM
10-17-2004 04:42 PM
Re: swapping vs. paging
Just a note to you. You can get repeated questions from
search with ITRC forums(hp) with required keyword there.
Some more advanced options also given there. Try with your keywords and do get more informations.
HTH.
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10-17-2004 04:52 PM
10-17-2004 04:52 PM
Re: swapping vs. paging
swapout and pageouts are usually interchanged. The pageout/swapout activity depends on three thresholds.
otsfree: There may be a lot of free memory pages and it is the upper bound below which the paging will not occur.
desfree: This is the number of free pages desired. This is actually the limit where the pageouts will begin. This is the lower bound to page outs.
minfree: The minimum amount of free pages. If the memory available falls below this line, it indicates thrashing and you can see the entire processes getting deactivated. And this is usually termed as swapping outs.
So, in the nut shell, we call 'pageouts' when the most inactive pages are pagedout and 'swapouts' when the entire processes are swapped out. The reversal of this activity is 'in's.
Memory mapped activity can also be seen as paging activity. The best way to figure out if it is really paging or not is to keep track of 'free memory'. You can see both pageouts and free memory using 'vmstat' command.
-Sri
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10-18-2004 12:33 AM
10-18-2004 12:33 AM
Re: swapping vs. paging
Rgds...Geoff
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10-18-2004 01:24 PM
10-18-2004 01:24 PM