# [[metric:locks_per_backend]]

> Rows in pg_locks grouped by backend.
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Rows in pg_locks grouped by backend.

## Referenced by wait events {#wait-events}

- [Lock/advisory](/lock/advisory/)
- [Lock/applytransaction](/lock/applytransaction/)
- [Lock/extend](/lock/extend/)
- [Lock/frozenid](/lock/frozenid/)
- [Lock/object](/lock/object/)
- [Lock/page](/lock/page/)
- [Lock/relation](/lock/relation/)
- [Lock/spectoken](/lock/spectoken/)
- [Lock/transactionid](/lock/transactionid/)
- [Lock/tuple](/lock/tuple/)
- [Lock/userlock](/lock/userlock/)
- [Lock/virtualxid](/lock/virtualxid/)
- [LWLock/LockManager](/lwlock/lock-manager/)