> [!NOTE] ![[assets/wl_lwlock_logicalparallelapplyhash.png|256]] > > | | | > | :--- | :--- | > | **Wait Category** | LWLock | > | **Mechanism** | `LogicalRepParallelApplyLock` | > | **Operations** | [[Operations/Distributed/Redistribute]] | > | **Resources** | [[Resources/RAM|Memory]], [[Resources/CPU|CPU]] | > > Synchronization stall in **Parallel Replication Coordination**. To ensure that changes from a single transaction are applied in the correct sequence across multiple parallel workers, the engine maintains a shared hash table to track dependencies and worker progress.