Re: SSD as Cache?

["Karl E. Jorgensen" <karl@jorgensen.org.uk>]

Hi

On Fri, Nov 08, 2013 at 03:12:08PM +0100, basti wrote:
> Hello,
> 
> on my Webservers, I have 1x 128GB SSD and a Raid 1 (1TB).
> 
> Now I plan to improve the performance of my Webapplication.
>
> The Cache is about 10.0 GB in 2000000 files.
> 
> Can this cache moved to SSD?
> Months ago I read articles about SSD and Flash Memory like:
> - "Disable logging on SSD"
> - "Disable cache on SSD"
> - "Don't swap on SSD" ...

Standard practice for tuning is to make measurements first.

If your measurements show that disk IO is your bottleneck, then yes:
SSD may help. But if your bottleneck is elsewhere, then changing
things in the disk subsystem is unlikely to have any effect.

-- 
Karl E. Jorgensen