vinyl: keep track of range size on disk
vinyl: keep track of range size on disk

Required to check if a range should be coalesced with its neighbors.

mejedi/tarantool,mejedi/tarantool,mejedi/tarantool,rtsisyk/tarantool,rtsisyk/tarantool,rtsisyk/tarantool,mejedi/tarantool,rtsisyk/tarantool