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Jinwoo Hong
030a1e0c77
* fix(relay): stop holding a cell row across the whole control accept The cell accept path took the host's cell row FOR UPDATE at its first supersession statement and held it to COMMIT across a dozen round trips, which capped a cell far from Postgres at a couple of accepts a second. Fold every cell-row change on the path into one conditional delta write issued last, so the contended row is held only across the commit. * fix(relay): give relay_cells one global row lock order, taken last Moving the accept's cell-row write to the end of its transaction put it after the host's relay_control_connection_reservations rows, while every director path that reads the inventory took those rows the other way round. Pin one order for both roles -- host rows, then the shared cell row -- by locking the host's reservation rows before the inventory in the nine director paths that take both, document the tiers next to CellInventoryLockMode, and add a census that fails on a new path taking relay_cells first.