You should also electrically fix your VAr, i'm not fresh with my electronics knowledge but VAr (Volt-Ampers Reactive) has no effect electrically on equipment (those are waste) because you are billed by the resultant vector of the sum of Watts (work) + VAr (Waste) = Tariff Bill
About your monitoring command:
lsof -w /mnt/* | grep /mnt/ | wc -l
Have you taken a look into incrontab, maybe it's more cpu efficient, but i don't know, so you could take a look into it.
I guess the cheapest way to improve power factor is a cappacitive bank more info: https://fortop.co.uk/knowledge/white-papers/reactive-power-r...
About your monitoring command: lsof -w /mnt/* | grep /mnt/ | wc -l Have you taken a look into incrontab, maybe it's more cpu efficient, but i don't know, so you could take a look into it.