of course, as soon as paging comes in, that is something you can't control.
but besides that, by running your own cache, _you_ control what is cached
and what not, and not the operating system.
- martin
> -----Original Message-----
> From: Joe Sam Shirah [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, May 25, 1999 5:48 PM
> To: [EMAIL PROTECTED]
> Subject: Re: FW: file cache
>
>
> Hi,
>
> I agree with pretty much everything you said, although things will
> obviously differ from environment to environment and even run to run
> number of files, file size, app activity, number of apps,
> paging, and so
> on. ) I do wonder though, why you think caching would be
> more reliable
> particularly when paging is brought into the picture. )
>
>
> Joe Sam
>
> -----Original Message-----
> From: Eric Fialkowski <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
> Date: Tuesday, May 25, 1999 4:02 PM
> Subject: FW: file cache
>
> >
> >Martin,
> >
> >I have noticed a better than expected decrease (10-15%) in
> >execution time
> on a Sun host running JRun.
> >
> >In Linux, any caching that you're seeing is very limited and wouldn't
> >be consistent across multiple calls to a servlet, over a
> long period of
> >time, on a busy server. You're much better of not worrying about the
> >file i/o intricacies as the o/s and filesystem may dump your
> file from
> >the cache at any time.
> >
> >The method that you're using, by loading the file into your servlets
> >data address space should, overtime, see much better performance
> >and be more reliable. If you for some reason migrate to another O/S
> >you won't be guaranteed any of these filesystem behaviors. If you're
> >seeing little or no performance increase, maybe its b/c Linux is such
> >an efficient O/S. ;-)
> >
> >Regards,
> >
> >Brian
> >
>
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