for GC is now to combine cooperative and background modes. The new default behaviour generally guarantees better overall performance as the garbage collection is performed online, curtailing the growth

transaction. No special gdscodes are returned from conflicts involving pessimistic locks. The engine guarantees that all records returned by an explicit lock statement are actually locked and do meet the search as the search conditions do not depend on any other tables, via joins, subqueries, etc. It also guarantees that rows not meeting the search conditions will not be locked by the statement. It can not guarantee

transaction. No special gdscodes are returned from conflicts involving pessimistic locks. The engine guarantees that all records returned by an explicit lock statement are actually locked and do meet the search as the search conditions do not depend on any other tables, via joins, subqueries, etc. It also guarantees that rows not meeting the search conditions will not be locked by the statement. It can not guarantee