In one embodiment, a set of boundaries may be obtained, where the set of boundaries includes boundaries for each of one or more bins. The boundaries for each of the one or more bins may include a lower boundary and an upper boundary, wherein the set of boundaries of the one or more bins together defines a contiguous range of data values capable of being stored in the one or more bins. A data value may be obtained. The data value may be added to one of the one or more bins according to the boundaries of the one or more bins. It may be determined whether to modify the set of boundaries. The set of boundaries may be adjusted according to a result of the determining step.