On Wed, Sep 30, 2009 at 3:32 PM, Michael Dale <[email protected]> wrote:
> Has anyone done any scalability studies into minimal php @readfile
> script vs apache serving the file. Obviously apache will server the file
> a lot faster but a question I have is at what file size does it saturate
> disk reads as opposed to saturated CPU?

It will never be disk-bound unless the site is tiny and/or has too
little RAM.  The files can be expected to remain in the page cache
perpetually as long as there's a constant stream of requests coming
in.  If the site is tiny, performance isn't a big issue (at least not
for the site operators).  If the server has so little free RAM that a
file that's being read every few minutes and is under a megabyte in
size is consistently evicted from the cache, then you have bigger
problems to worry about.

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