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In SQL Server, wait types represent the discrete steps in query processing, where a query waits for resources as the instance completes the request. By analyzing wait types and their wait times, administrators can receive quick and objective evidence of performance bottlenecks and their probable causes. The MariaWaitEvtTest test enables this analysis. For every type of wait that is currently experienced by the server, this test reports the number, nature, and duration of waits, thereby leading you to the specific wait types that may have contributed to a general slowdown/deterioration in server performance.

Measurement	Description	Measurement Unit	Interpretation
Total_wait_events	Indicates the total number of wait events that are currently occurring on the database server.	Number
Read_wait_events	Indicates the events that are currently waiting for read operations on the database server.	Number	The detailed diagnosis of this measure reveals the Thread ID, Event ID, name of the event, the start time, end time, the duration of the event and the operations performed on the source.
Read_wait_event_rate	Indicates the rate at which wait events occurred for reading operations on the database server during the last measurement period.	Events/sec
Max_duration_for_read	Indicates the maximum time taken by a wait event for a read operation.	Seconds	A low value is desired for this measure.
Write_wait_events	Indicates the number of events that are currently waiting for write operations to be performed on the database server.	Number
Write_wait_events_rate	Indicates the rate at which wait events occurred for performing write operations on the database server during the last measurement period.	Events/sec
Max_duration_for_write	Indicates the maximum time taken by a wait event to perform write operation on the database server.	Seconds	A low value is desired for this measure.
Lock_wait_events	Indicates the number of events that are currently waiting for a lock operation on the database server.	Number
Lock_wait_events_rate	Indicates the rate at which wait events were created to perform lock operations on the database server during the last measurement period.	Events/sec
Max_duration_for_lock	Indicates the maximum duration taken by a wait event to perform lock operation on the database server.	Seconds	A low value is desired for this measure.