VariableQUERY_COORDINATOR
DescriptionQUERY_COORDINATOR Environment Variable
Defaulttrue

Whether this node should act as a query coordinator. Query coordinators are responsible for sending subqueries to storage nodes and combining the results. In clusters with "httponly" nodes (as described above), it often makes sense to set this to false for non-httponly nodes.

See ENABLE_QUERY_LOAD_BALANCING and NODE_ROLES for more information.