[Gllug] increase performance by increasing RAM or increasing in Core

[Peter Corlett]

On 16 Feb 2009, at 08:54, James Hawtin wrote:
[...]
> Using tmpfs for /tmp is a good idea if you have alot of ram that you  
> don;t
> know what to do with.

It's a good idea anyway, even if you don't have much RAM. The contents  
of a tmpfs *may* get swapped to disk if memory is better used  
elsewhere. Contrast with an tmpfs on a traditional filesystem which  
*will* get committed to disk.

The performance improvement is small, but useful enough to be worth  
the effort.

Also, don't just limit yourself to /tmp. There are all sorts of other  
caches on a Linux box that you might not care about keeping over a  
reboot, and which are thus also candidates for a tmpfs. For example,  
Exim's retry and callout cache in /var/spool/exim4/db/.


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