Messages in this thread | | | Date | Wed, 5 Dec 2001 16:22:38 -0200 (BRST) | From | Rik van Riel <> | Subject | Re: /proc/sys/vm/(max|min)-readahead effect???? |
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On Wed, 5 Dec 2001, Marcelo Tosatti wrote: > On Wed, 5 Dec 2001, Roy Sigurd Karlsbakk wrote: > > > I've just upgraded to 2.4.16 to get /proc/sys/vm/(max|min)-readahead > > available. I've got this idea... > > > > If lots of files (some hundered) are read simultaously, I waste all the > > i/o time in seeks. However, if I increase the readahead, it'll read more > > data at a time, and end up with seeking a lot less. > > Do you also have VM pressure going on or do you have lots of free memory ?
I suspect the per-device readahead for IDE is limiting the effect of vm_max_readahead ...
Rik -- Shortwave goes a long way: irc.starchat.net #swl
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