Re: VM: Buffer vs. Cache

Martin.Knoblauch (Martin.Knoblauch@TeraPort.de)
Tue, 19 Jun 2001 09:27:42 +0200

Jonathan Morton wrote:
>
> >
> > So, what actually is the difference between Buffered and Cached.
> >Apparently quite a lot of the pages that are Cached in the evening are
> >Buffered 9 houres later.
>
> Think about what happens in the meantime. Most distros install maintenance
> scripts which run late at night (usually at midnight and/or 4am), which
> perform heavy disk activity as they update databases and scan for
> file-permissions security holes. Heavy disk activity usually means an
> increase in buffer utilisation. Since most files are only "touched" once,
> the cache is shrunk as it aren't being used very much.
>

thanks to all who set me straight. Should have thought of the nightly
stuff myself.

Martin

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