Possible values: integer values.
Default value: 0.
File: configuration file.
Context: DatabaseManager, Database.
Time for transaction to acquire a lock on global cache (Wrapper), before it can hide certain DOs from cache. Hiding is necessary, because during commit, there is a point in time in which some DOs in the cache are becoming out of sync with database. After hidding, the lock is released, so other transactions could hide their own DOs.