Using derivative functions in alerts to look at speed or acceleration is a game changer. You really care about time to fill (speed), and whether your system ha

Using derivative functions in alerts to look at speed or acceleration is a game changer. You really care about time to fill (speed), and whether your system has gone nuts and is logging faster and faster than normal (acceleration). Disk usage is X says do little. Disk utilization rate is Y therefore will fill by YYYYMMDD is great. Disk utilization rate change has gone off the chart so a process crapped itself and will fill the disk in 5 mins is life saving.