> [!NOTE] ![[assets/wl_activity_parallelworkermain.png|256]] > > | | | > | :--- | :--- | > | **Wait Category** | Activity | > | **Mechanism** | `ParallelWorkerMain` | > | **Operations** | [[Operations/Table/SeqScan]], [[Operations/ResultSet/HashJoin]] | > | **Resources** | [[Resources/CPU|CPU]] | > > A **Parallel Worker** is idling in its main loop. This state typically occurs during the very beginning or end of a query's lifecycle, as workers are spawned and detached.