> [!NOTE] ![[assets/wl_lwlock_dsmregistryhash.png|256]] > > | | | > | :--- | :--- | > | **Wait Category** | LWLock | > | **Mechanism** | `DSMRegistryLock` | > | **Operations** | [[Operations/Other/FunctionScan]] | > | **Resources** | [[Resources/RAM|Memory]], [[Resources/CPU|CPU]] | > > Contention on the **Registry Lookup Layer**. To enable backends to quickly find the shared memory blocks they need, the DSM system maintains a hash table in shared memory where every segment's name is mapped to its internal handle.