| Option | QueryCoordinatorMaxHeapFraction | |
| Description | Configures query queueing based on the available memory in the query coordinator. | |
| Introduced Version | 1.97.0 | |
| Default | 0.5 | |
      Configures query queueing based on the available memory in the
      query
      coordinator. To disable queing, set it to
      1000.