My understanding of estimated droppable tombstones value is =
(Number of columns where tombstones passed gc_grace_seconds/Number of columns).
But in some sstablemetadata output, I could see the value is more than 1. How come it is possible? At a specific point in time, let's assume all columns become tombstone, which passed gc_grace_seconds then the value would be 1. Then how is it more than 1 subsequently...is that time dependant? i.e. as time passes, the value will be increased?