While working on https://github.com/MaterializeInc/materialize/pull/18766, we noticed that allowing physical and logical compaction of a trace to the empty frontier prevents compaction, even if other owners of the trace eventually allow compaction. It is required to repeatedly allow compaction with a sensible frontier (i.e., read_upper followed by allowing compaction) to enable compaction of the spine.
(Placeholder, @antiguru to add more info+repro)
While working on https://github.com/MaterializeInc/materialize/pull/18766, we noticed that allowing physical and logical compaction of a trace to the empty frontier prevents compaction, even if other owners of the trace eventually allow compaction. It is required to repeatedly allow compaction with a sensible frontier (i.e.,
read_upperfollowed by allowing compaction) to enable compaction of the spine.