May 2019
Intermediate to advanced
484 pages
11h 23m
English
Content preview from Learn T-SQL Querying
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WaitForMemoryGrant*
WaitForMemoryGrant* happens when a query waits more than one second to acquire a memory grant or when the initial attempt to get the memory fails. RESOURCE_SEMAPHORE waits may indicate an excessive number of concurrent queries, or an excessive amount of memory grant requests that the current resources cannot handle.
The warning reports the number of seconds the query had to wait for MemoryGrant during execution:
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