In linux, what they call swapping is actually paging. Swapping was an old term from a time, that apparently it did swap.
My guess, is that this swapping is being driven by a Linux application. Note that you really are not paging in. So, something is being paged out and never used again. I'm thinking in the lines of Oracle or DB2 with a large cache area, that is too large for the Linux machine size. Old data in cache is being paged out by Linux. Then the database wants to reuse the oldest cache pages, it just recreates them, without reloading the old data into storage first. If that is the case, that is kind of nicely done. Some other systems will page in the old pages just to put new data in them. It would be a lot worse if you were paging in also. So once you identify the application doing this, then you/management can make a decision on either trimming down its memory use, keep it the same, or increase the size of the Linux machine (which will have that machine use more real memory, a valuable resource). Tom Duerbusch THD Consulting >>> [EMAIL PROTECTED] 6/7/2006 9:12 AM >>> Would someone please shed light on the following for me. What is the dif from swaping to paging other than swaping is using the swap space? I can't seem to find much info on paging? I believe if I'm swapping heavily that's bad, but where does the pageing go and is it bad for perf? THANX!!! % Swap space used 0% Swap-in rate 0/s Swap-out rate 0/s Page-in rate 0.066/s Page-out rate 50.133/s Brian W. France Systems Administrator (Mainframe) Pennsylvania State University Administrative Information Services - Infrastructure/Sysarc Rm 25 Shields Bldg., University Park, Pa. 16802 814-863-4739 [EMAIL PROTECTED]
