Re: [9fans] memory

[andrey mirtchovski <mirtchov@cpsc.ucalgary.ca>]

i find the following useful.  i'm lazy and i'm not good at multiplying
by blocksize in my head :)

	plan9% cat /bin/mem
	#!/bin/rc
	
	# show available and used memory in
	# user-discernible format.
	
	all=`{cat /dev/swap | sed 's,/, ,g'}
	
	# 4096/(1024*1024)
	pageinmb=0.00390625 
	
	mem = `{echo $all(1)^'*'^$pageinmb | hoc }
	memtotal = `{echo $all(2)^'*'^$pageinmb | hoc}
	swap = `{echo $all(4)^'*'^$pageinmb | hoc }
	swaptotal = `{echo $all(5)^'*'^$pageinmb | hoc}
	
	echo memory: $mem MB used. $memtotal MB total
	echo swap: $swap MB used. $swaptotal MB total
	
	plan9% 

it helps those times when one has forgotten to turn on the swap or is
using only 16 megs of ram instead of the available 128 :)

it output looks like this on plan9.ucalgary.ca (10000 blocks fossil cache):

	plan9% mem
	memory: 126.6640625 MB used. 430.27734375 MB total
	swap: 0 MB used. 611.76953125 MB total
	plan9%