const RETENTION_BATCH_SIZE: usize = 1000;Expand description
Rows retracted per retention step.
Retention has to be bounded: the OCC path refuses a selection larger than
max_result_size before submitting any write, so an unbounded delete over a
large backlog would fail identically on every sweep and never shrink the
table. Retention repeats bounded batches across sweeps until it drains the
fixed-cutoff backlog.