| Type: | bool |
| Default: | off |
| Context: | superuser |
| Restart: | false |
| Since: | 18 |
Controls whether a detailed log message is produced when a lock acquisition fails. This is useful for analyzing the causes of lock failures. Currently, only lock failures due to SELECT NOWAIT is supported. The default is off. Only superusers and users with the appropriate SET privilege can change this setting.