readahead_early
Ted Bolver
kellen3t3 at yahoo.com
Wed Jan 19 00:07:11 UTC 2005
--- Nifty Hat Mitch <mitch48 at sbcglobal.net> wrote:
> On Tue, Jan 18, 2005 at 02:51:28PM -0800, Ted Bolver
> wrote:
>
> > readahead
> > readahead_early
> ....
>
> > Is there a distinction between them;
>
> Yes. see the list of files that are read.
>
> > Do you need them *both* checkboxed;
>
> You do not need either.
>
> The readahead process preloads the buffer cache with
> files that might
> be paged in one 'page demand triggered' read at a
> time. This can
> speed things up of boxes with enough DRAM.
>
> BIG Programs like OO that are started with a wraper
> script could
> use this trick to advantage in some cases.
>
> > Incidentally they've both got exactly the same
> service
> > descriptions ie:
> >
> > ""This service causes the programs used during
> startup
> > to be loaded into memory before they are needed,
> thus
> > improving startup performance""
>
>
> /etc/init.d/readahead: /usr/sbin/readahead `cat
> /etc/readahead.files` &
> /etc/init.d/readahead_early: /usr/sbin/readahead
> `cat /etc/readahead.early.files` &
>
> So the difference is /etc/readahead.files and
> /etc/readahead.early.files.
Thanks for that man - I'll look into it further.
--Ted
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