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From "Michael Avila" <>
Subject RE: [users@httpd] Caching Images
Date Wed, 21 Dec 2005 03:12:28 GMT
Interesting! Thanks for the tips. I'll look in to it. But it does sound like I will not need



> -----Original Message-----
> From: []On Behalf Of Joshua
> Slive
> Sent: Tuesday, December 20, 2005 10:04 PM
> To:
> Subject: Re: [users@httpd] Caching Images
> On 12/20/05, Michael Avila <> wrote:
> > The idea is to have the images be cached (even in memory if 
> possible) so that it is super fast as I am running this on my PC 
> that I use for other things. And I only have 1 GB of memory.
> >
> > It is my understanding from reading posts that mod_cache relies 
> on the expire statement. Images will not have that so I was 
> wondering how to cache only them. This is a phpBB forum with 
> oscommerce. Oscommerce more than phpBB has images.
> mod_cache will also cache based on Last-Modified headers, which all
> static files will have.  But you can also add expires headers with
> mod_expires.
> But really, caching static images in this way is going to save you
> very very little.  Assuming your OS has an efficient sendfile syscall,
> it will already be implicitly caching and doing zero-copy network
> sends on frequently-used files.  Putting mod_cache in front of that
> will not make a noticable difference unless you are trying to fill an
> extremely big network pipe.
> You can also look at mod_file_cache
> But you should really test this under load, because depending on the
> details of your setup, ordinary sendfile-based serving could be
> faster.
> Joshua.

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