May 2019
Intermediate to advanced
484 pages
11h 23m
English
Content preview from Learn T-SQL Querying
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WaitStats
WaitStats* can expand to show additional information about the top 10 waits accrued while the query was executing in the scope of the current session, in descending order of wait time. For each wait, the following three properties are available:
- WaitCount*: This refers to the number of times that tasks associated with this request had to wait for a required resource to become available
- WaitTimeMs*: This refers to the overall wait time in milliseconds for the number of times a query had to wait during query execution
- WaitType*: This refers the wait type as documented in the SQL Server documentation under the sys.dm_os_wait_stats DMV.
Here is the detail for this property for the example query:
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