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What can I use extended events data for?
Extended Events supports using event data outside a process. This data is typically used by: Tracing tools, such as SQL Trace and System Monitor. Logging tools, such as the Windows event log or the SQL Server error log.
Which is a feature of the extended events engine?
Extended Events has the following key design aspects: The Extended Events engine is event agnostic. Events are separated from event consumers, which are called targets in Extended Events. Events are distinct from the action to take when an event occurs. Predicates can dynamically filter when event data should be captured.
What can extended events output be directed to?
In the operating system case, Extended Events output must be directed to Event Tracing for Windows (ETW). ETW can correlate the event data with operating system or application event data. All applications have execution points that are useful both inside and outside an application.
Where to find extended events in SQL Server?
You can find more information about Extended Events at Quickstart: Extended events in SQL Server. Extended Events is a lightweight performance monitoring system that uses minimal performance resources.
How are extended events separated from event consumers?
Events are separated from event consumers, which are called targets in Extended Events. This means that any target can receive any event. In addition, any event that is raised can be automatically consumed by the target, which can log or provide additional event context. For more information, see SQL Server Extended Events Targets.
You can see these event sessions in the SSMS Object Explorer under Management > Extended Events > Sessions. As of June 2016, the list of these installed event sessions is: AlwaysOn_health; system_health; telemetry_events; PowerShell provider for extended events. You can manage SQL Server extended events by using the SQL Server PowerShell provider.
How does the Wizard work for extended events?
The wizard worked just fine. It created a session which scripted out as this: I started up the session and started running some code to create the AutoStatsTest database, populate data in a table, and then run some SELECT queries.
What happens when you set up an extended events trace?
It didn’t warn me that I was doing something problematic. But it also made it pretty easy to set up my trace, and also test my theory about what was wrong with it. Summing up: when you set up an Extended Events trace, just because you set a filter or predicate on a field doesn’t necessarily mean that it can use the filter.