pub const DEFAULT_AUTO_VACUUM_THRESHOLD: f32 = 0.25;Expand description
Default fraction of free pages that triggers an auto-VACUUM after
a page-releasing DDL (DROP TABLE / DROP INDEX / ALTER TABLE DROP
COLUMN). Matches SQLite’s classic 25% heuristic. Override per
connection with Database::set_auto_vacuum_threshold (or
Connection::set_auto_vacuum_threshold); pass None to disable.