Power consumption tuning

[Frank Shute]

On Tue, Aug 09, 2016 at 04:56:40PM +0100, RW via freebsd-questions wrote:
>
> On Tue, 09 Aug 2016 17:03:36 +0200
> Solène Rapenne wrote:
> 
> 
> > Buying a device to measure the power consumption is also a good idea,
> > so you can check your changes.
> > It costs around 12€. Example
> > http://www.ecvv.com/product/1000019919.html
> 
> A lot of those cheap power meters will work with simple loads like
> heaters or fridges,  but are very inaccurate with computers. I have one
> and I've heard a lot of bad reports about them.
 
If you've got a UPS (and you should have IMO) then you can get the power
usage. Eg:

$ apcaccess -p LOADPCT
33.0 Percent

and:

$ apcaccess -p NOMPOWER
210 Watts

So I'm using ~70W ATM.

Trivial to script a report maybe with the help of cron.

I'd guess the accuracy is good enough for most purposes. I'm sure APC publish
such info on their website.


Regards,

-- 

Frank

https://woodcruft.co.uk/