Web caching

[Jonathan T. Ledlie]

Another alternative is to park a web cache like Squid
(http://www.squid-cache.org/) locally, but in front of the web server.  You
can put this on the same box or a dedicated one.

-jonathan


On Tue, 25 Jul 2000, Randall Hofland wrote:

> My curiousity is piqued: can one use a RAMdisk to run a dedicated Apache
> cache assuming the memory is available or is it just best to use the fastest
> disk possible, perhaps a mirrored RAID set?
> 
> "Mark J. Dulcey" wrote:
> 
> > Ron Peterson wrote:
> > >
> > > I'm curious.  Does Apache cache static web content in memory?  I.E. - if
> > > I request a static page, does Apache store that page in memory for some
> > > period of time, in case someone else asks for it?  Or does Apache fetch
> > > the page from disk each and every time?  If it is cached, then for how
> > > long?  Is there a cache timeout parameter?
> >
> > I believe that Apache simply fetches the file from disk each time. Of
> > course, the underlying operating system is likely to cache the file.
> > It's not clear that adding a cache to Apache would be better than
> > letting the OS handle it; the likely result would be to have Apache
> > cache too little (slowing it down) or too much (slowing other
> > applications down).
> >
> > > Taking this a step further, would PHP perhaps do the same thing?
> > > Obviously dynamic content, like database data, would need to be
> > > requeried, but the php files themselves could be loaded every "x" number
> > > of minutes or something.
> >
> > I know that mod_perl caches loaded code, so that it doesn't have to
> > reload and recompile it. That's a much more expensive operation than
> > simply fetching a file from disk, so an internal cache is the right
> > thing here. I don't know what PHP does.
> >
> > This, of course, can be awkward in a development environment - your code
> > changes don't take effect right away. I suppose the solution is not to
> > run your in-development scripts under mod_perl unless you have to (if
> > they're depending on looking at some Apache internals, for example).
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