PostgreSQL: Documentation: 9.4: VACUUM - PostgreSQL: The world's most advanced open source database

PostgreSQL: Documentation: 9.4: VACUUM - PostgreSQL: The world's most advanced open source database

瀏覽:431
日期:2024-07-23
Description VACUUM reclaims storage occupied by dead tuples. In normal PostgreSQL operation, tuples that are deleted or obsoleted by an update are not physically removed from their table; they remain present until a VACUUM is done. Therefore it's necessar...看更多