arangodb/Documentation/DocuBlocks/schedulerMaximalQueueSize.md

@brief maximum size of the dispatcher queue for asynchronous requests --scheduler.maximal-queue-size size

Specifies the maximum size of the dispatcher queue for asynchronous task execution. If the queue already contains size tasks, new tasks will be rejected until other tasks are popped from the queue. Setting this value may help preventing from running out of memory if the queue is filled up faster than the server can process requests.