On Wed, 2005-10-19 at 00:10 -0400, Lee Revell wrote:
> On Tue, 2005-10-18 at 22:01 +0200, Guido Fiala wrote:
> > Of course one could always implement f_advise-calls in all
> > applications
>
> Um, this seems like the obvious answer. The application doing the read
> KNOWS it's a streaming read, while the best the kernel can do is guess.
>
> You don't really make much of a case that fadvise can't do the job.
The issue is, how will "other/random" programs/applications affect
performance of my application.
Complain I hear most is from our database folks, they tune stuff
and they are happy with their performance. And then, some one does
a tar/cp/cpio/ftp/backup/compile on some random files on the system.
Suddenly, database performance drops. They want to see a system wide/
per-filesystem tunable on how much pagecache it takes up.
Andrew, does this make sense at all ?
Thanks,
Badari
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