The PREEMPTIVE_OS_GETPROCADDRESS wait type occurs when SQL Server is making a call to the operating system for something like xp_create_subdir, or other xp_ type procedures. When this occurs it clogs things up temporarily and causes other parts of your database to …
SOS_SCHEDULER_YIELD
Wait: PREEMPTIVE_OS_COMOPS Preemptive waits means that something is interrupting SQL Server and the database is waiting for this to complete. Non-Preemptive means that there is cooperation with SQL Server. In this case the PREEMPTIVE_OS_COMOPS wait means that SQL Server has been …
The Historic Waits advisor gives you a break down of the waits that have been caused by a given query or plan. For instance in screenshot below you can see that IO_COMPLETION is the most common wait type from the …
The Historic Waits reports may be the most valuable part of the entire Database Health Reports Project. With the historic waits reporting you can track down not just what your system is waiting on now, but also what it …
SQL Server wait statistics refer to the amount of time that a SQL Server process spends waiting on certain types of events or resources before it can complete its work. These events or resources could include things like locks on …
Understanding SQLTRACE Wait Types in SQL Server When tuning SQL Server for performance, understanding wait statistics is a key diagnostic tool. Among the many wait types, SQLTRACE wait types are often less understood. While they may not directly impact query …
BROKER_CONNECTION_RECEIVE_TASK BROKER_ENDPOINT_STATE_MUTEX BROKER_EVENTHANDLER BROKER_INIT BROKER_MASTERSTART BROKER_RECEIVE_WAITFOR BROKER_REGISTERALLENDPOINTS BROKER_SERVICE BROKER_SHUTDOWN BROKER_TASK_STOP BROKER_TO_FLUSH BROKER_TRANSMITTER
The IO_COMPLETION wait indicates that SQL Server is waiting on something related to IO to finish. In the event that you are seeing the IO_COMPLETION wait this generally indicates non-data page IO. Check the placement of your database files. How …
IO_ wait types: IO_COMPLETION