-1, 0, positive integer

-1

When this option is set to -1 (the default) or any value less than 0, the request waits for a memory grant for up to 50 times the estimated execution time for the request. If this option is set to 0, the request waits forever for memory to be granted. Otherwise, the value is the maximum time, in milliseconds, that a request waits for a memory grant.

• Cache and the memory governor
• query_mem_timeout connection property