Messages in this thread | | | Subject | Re: Swap vs. ext2 fragmentation avoidance? | Date | Fri, 24 Apr 1998 22:30:44 -0500 (CDT) | From | kwrohrer@enteract ... |
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And lo, James Mastros saith unto me: > Somthing has occured to me reading the discussions on > memory-fragmentation: why we can't effectivily use ext2fs's > fragmentation-avoidiance with our memory? I'm shure I'm missing somthing > /really/ simple here, but I don't know what it is. (1) most of memory is filled by the page cache and running programs, neither of which suffer any penalty from fragmentation in physical memory.
(2) Likewise, the pages in memory don't often correspond to whole things such that they could be kept track of together even if they did care.
(3) e2fs's fragmentation avoidance breaks down when you run low on free space. With physical memory, if you're not low on free physical memory either something's wrong or you just quit a big application. The key to good performance is to keep nearly all your memory in use and shift back and forth between cache and program space as needs change...
Keith
-- "The avalanche has already started; |Linux: http://www.linuxhq.com |"Zooty, it is too late for the pebbles to |KDE: http://www.kde.org | zoot vote." Kosh, "Believers", Babylon 5 |Keith: kwrohrer@enteract.com | zoot!" www.midwinter.com/lurk/lurker.html |http://www.enteract.com/~kwrohrer | --Rebo
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