Module metrics 

Process-wide work counters for columnar chunk maintenance.

Counts describe work attempted, including repeated processing of the same updates. Bytes are serialized uncompressed sizes, not extent or device writes, and only the commit stage records them. Row-size buckets are disjoint, indexed by ceil(log2(rows)) with zero and one sharing bucket zero and the last bucket absorbing everything larger. Counters at different stages must not be added together.

Functions

record_batch

Record one batch an upsert feedback arrangement published, including empty batches.