# Some commonly-used locks have predefined positions within MainLWLockArray; # these are defined here. If you add a lock, add it to the end to avoid # renumbering the existing locks; if you remove a lock, consider leaving a gap # in the numbering sequence for the benefit of DTrace and other external # debugging scripts. # 0 is available; was formerly BufFreelistLock ShmemIndexLock 1 OidGenLock 2 XidGenLock 3 ProcArrayLock 4 SInvalReadLock 5 SInvalWriteLock 6 WALBufMappingLock 7 WALWriteLock 8 ControlFileLock 9 CheckpointLock 10 CLogControlLock 11 SubtransControlLock 12 MultiXactGenLock 13 MultiXactOffsetControlLock 14 MultiXactMemberControlLock 15 RelCacheInitLock 16 CheckpointerCommLock 17 TwoPhaseStateLock 18 TablespaceCreateLock 19 BtreeVacuumLock 20 AddinShmemInitLock 21 AutovacuumLock 22 AutovacuumScheduleLock 23 SyncScanLock 24 RelationMappingLock 25 AsyncCtlLock 26 AsyncQueueLock 27 SerializableXactHashLock 28 SerializableFinishedListLock 29 SerializablePredicateLockListLock 30 OldSerXidLock 31 SyncRepLock 32 BackgroundWorkerLock 33 DynamicSharedMemoryControlLock 34 AutoFileLock 35 ReplicationSlotAllocationLock 36 ReplicationSlotControlLock 37 CommitTsControlLock 38 CommitTsLock 39 ReplicationOriginLock 40 MultiXactTruncationLock 41 OldSnapshotTimeMapLock 42