What does this available mean in AMC?

Please check following, the available doesn’t mean disk or memory, so I have no idea about this available.

From

What is Available Percent?

Available Percent is a critical statistic for the Aerospike Server as well as a key indicator in determining when to scale up/out your service. Available Percent measures the minimum contiguous disk space for all disks in a namespace ((avail_pct = min(contig_disk for all disks in namespace) )).

100-(Disk used% + un-Defragmented data %)= available percent. OR (if lower) 100-memory used %. Expect this to be 10-20 percent above disk used. Aerospike is just waiting for a more efficient time to move this data around.