Auto scaling

Label name	Default value
SCALE_AUTO	0
SCALE_DELAY	5
SCALE_MAX_CPU_PERCENT	75
SCALE_MIN_CPU_PERCENT	40
SCALE_MAX_MEM_PERCENT	75
SCALE_MIN_MEM_PERCENT	40
SCALE_SERVICE_REPLICATE_MIN	1
SCALE_SERVICE_REPLICATE_MAX	10
SCALE_SERVICE_ADD_COUNT	1