> [!NOTE] ![[assets/wl_lwlock_dsmregistryentry.png|256]] > > | | | > | :--- | :--- | > | **Wait Category** | LWLock | > | **Mechanism** | `DSM` | > | **Operations** | [[Operations/Table/SeqScan]], [[Operations/Index/IndexScan]] | > | **Resources** | [[Resources/RAM|Memory]], [[Resources/CPU|CPU]] | > > **Parallel Resource Access Bottleneck**. Unlike the global `DynamicSharedMemoryControl` (which protects the entire registry), the registry entry lock protects the state of a single memory segment used by a specific parallel query or background worker.