Old, unused segments are accumulating. Perhaps due to errors during deletion (or something) they don't get cleaned up.

We need to figure out why they are not getting cleaned up and fix it (potentially by adding a housekeeping task to delete them).

george moromisato 28 Nov 2017:

This was probably a false alarm. I forgot that each view has its own list of segments. Also, due to the merging algorithm, each view had at least 3 segments.

I've improved the merging algorithm in Beta 64 so we merge more aggressively.

But in any case, I don't think this was a bug.