Eric at Lucii.org on 8 Jan 2011 08:19:34 -0800


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Re: [PLUG] Linux n00b question 

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On 01/08/2011 09:09 AM, Doug Stewart wrote:
> On Sat, Jan 8, 2011 at 6:07 AM, Art Alexion <art.alexion@gmail.com> wrote:
>> On my netbook with one 8, and one 32 GB drive, I put Ubuntu / on the 8 GB drive and /home on the 32. I haven't encountered any problems with the 8 filling up. With a TB, you could probably go with 20 for /. I use 2X physical ram as a rule of thumb for /swap.
>>
> 
> The 2x memory anachronism ought to die. It's archaic and no longer
> true and in today's larger memory systems, it's a waste of space.
> (See, e.g., http://www.cyberciti.biz/tips/linux-swap-space.html)
> 
> Rule of thumb: for < 2 GB RAM, swap = RAM size. 4 - 16 GB RAM, swap =
> 4 GB. 16 - 64 GB RAM, swap = 8 GB. 64 - 256 GB RAM, swap = 16 GB.
> 

There was an extensive discussion of swap size at PLUG Central on Wednesday and
many folks opined that the 2x RAM recommendation was typically too high in
modern systems.

When I set up my current workstation 3 (or so) years ago I put in 4 GB of ECC
RAM and 4 GB of swap.  Today, with only Firefox, Thunderbird and a few xterms
running I checked the memory usage:

root@ursa:~# free
             total       used       free     shared    buffers     cached
Mem:       3096612    2512300     584312          0      63500    1843220
- -/+ buffers/cache:     605580    2491032
Swap:      3863624          0    3863624

Nice to know about the free command...  it's much more useful than sudo cat
/proc/meminfo


Eric
- -- 
#  Eric Lucas
#
#                "Oh, I have slipped the surly bond of earth
#                 And danced the skies on laughter-silvered wings...
#                                        -- John Gillespie Magee Jr
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