Messages in this thread | | | Date | Thu, 6 Dec 2001 12:31:03 +0100 (CET) | From | Roy Sigurd Karlsbakk <> | Subject | Re: /proc/sys/vm/(max|min)-readahead effect???? |
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Thanks!
It works
On Wed, 5 Dec 2001, Andrew Morton wrote:
> Roy Sigurd Karlsbakk wrote: > > > > hi all > > > > 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. > > > > The harddrive I'm testing this with, is a cheap 20G IDE drive. > > /proc/sys/vm/*-readhead is a no-op for IDE. It doesn't do > anything. You must use > > echo file_readahead:100 > /proc/ide/ide0/hda/settings > > to set the readhead to 100 pages (409600 bytes). > > - >
-- Roy Sigurd Karlsbakk, MCSE, MCNE, CLS, LCA
Computers are like air conditioners. They stop working when you open Windows.
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