Re: Disk Cache with multiple virtual hosts (Apache Users)

On Thu, Jun 20, 2013 at 2:27 AM, Igor Cicimov <icicimov@xxxxxxxxx> wrote:

On 20/06/2013 1:07 AM, "Paul Beckett" <paul_beckett@xxxxxxxxxxx> wrote:
>
> Can mem_cache be configured to cache way more than you have memory, and swap out to disk for whatever is least popular?
>
No but how much cache do you need? On the heavy load prod servers we were using 1GB mem cache. Most of the caching is done on the client side anyway.

> ________________________________
> Date: Wed, 19 Jun 2013 09:11:16 +1000
> From: icicimov@xxxxxxxxx
> To: users@xxxxxxxxxxxxxxxx
> Subject: Re: Disk Cache with multiple virtual hosts
>
>
>
> On 18/06/2013 5:21 PM, "Paul Beckett" <paul_beckett@xxxxxxxxxxx> wrote:
> >
> > I've read the Apache 2.4 caching guide, mod_cache and mod_cache_disk pages, but am unsure whether I need a unique CacheRoot for each virtual host, or whether multiple virtual hosts can/should share the same CacheRoot?
> >
> > Also I'm thinking of setting the CacheRoot to be a tmpfs mount (effectively a ramdisk that will page out to swap space if theres not enough ram to cache everything).
>
> Why not mem cache then? Why would you bother with ramdisk if you want to cache in memory?
>
> If I'm using a unique CacheRoot (a sub-directory in the tmpfs mount), is there anyway to configure Apache to create the CacheRoot directory if it doesn't already exist? If anyone has any thoughts / recommendations / tips in this regards to this approach I would be grateful to here them.
> >
> > Thanks,
> > Paul

Thanks and Regards

Rishu Ranjan

Software Engineer

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