I'll have to disagree with Tilghman on this one.  You should always have at 
least as much swap as ram, however double would be over kill.  If for no other 
reason than to guaranty you get a full core dumps on system crashes.  Trying to 
trouble shoot or root cause assess system crashes without good core dumps is 
difficult if not imposable. 

Disk space is cheap, if you can afford the RAM having the swap equal it should 
be a trivial cost, and gives you more time to find fast memory leaks before 
systems go catatonic. 


On Mar 2, 2013, at 1:07 AM, Tilghman Lesher wrote:

> On Fri, Mar 1, 2013 at 4:44 PM, Curt Lundgren <[email protected]> wrote:
>> swap - twice the resident RAM
> 
> That may have been the rule back when we had less than 1GB RAM (in
> fact, I've heard 3 times physical RAM at one point, back in the days
> of 32MB RAM and less).  These days, I don't see a good reason to have
> more than about 4-8GB of swap, even if you have 16GB of physical RAM.
> In fact, you really ought not to be swapping, ever, anymore.  The only
> reason to have swap at all is that the kernel will misbehave if you
> ever run out of physical RAM (memory leak?) and there is no swap.
> 
> -Tilghman
> 
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