#influxdb

Can i store a pair of integers as a tuple in influxdb?

hi all, I am getting metrics from collecd currently testing the memory plugin, I have Used/Free metrics and would like to get the usage percentage, that means I need to do something like Usage * 100 / (Usage+Free)

my question is how could I sum the mean from 'Used' and 'Free' (to get the total memory) and then use it to calculage the percentage used by * 100

wondering if I this may work to sum 2 values: SELECT SUM(value) FROM memory_value where "type_instance" =~ /(free|used)/