BuildSpillMerge	crates/gravity/lowerv4/src/ops/hashjoin/spill/raw/region.rs	grow_leader	lifetime	-	a spilled hash build's leader merge past G grows uncapped	hash join	A parallel hash join that spills its hash table can still grow it past its memory share while the leader merges the workers' parts, where PostgreSQL's parallel hash join spills each batch, so the statement fails with an out-of-memory error when the server has no more memory to give it.
