delta = 1 minute;
ruleset
     kernel.all.load #'1 minute' > 10 * hinv.ncpu ->
         print "extreme load average %v"
else kernel.all.load #'1 minute' > 2 * hinv.ncpu ->
         print "moderate load average %v"
unknown ->
         print "load average unavailable"
otherwise ->
         print "load average OK"
;