Auto Stats Event Class


Applies To: SQL Server 2016

The Auto Stats event class indicates that an automatic updating of index and column statistics has occurred.

Data column nameData typeDescriptionColumn IDFilterable
ApplicationNamenvarcharName of the client application that created the connection to an instance of SQL Server. This column is populated with the values passed by the application rather than the displayed name of the program.10Yes
ClientProcessIDintID assigned by the host computer to the process where the client application is running. This data column is populated if the client provides the client process ID.9Yes
DatabaseIDintIdentifier of the database specified by the USE database statement or the default database if no USE database statement has been issued for a given instance. SQL Server Profiler displays the name of the database if the ServerName data column is captured in the trace and the server is available. Determine the value for a database by using the DB_ID function.3Yes
DatabaseNamenvarcharName of the database in which the user statement is running.35Yes
DurationbigintAmount of time (in microseconds) taken by the event.13Yes
EndTimedatetimeTime at which the event ended.15Yes
ErrorintError number of a given event. Often this is the error number stored in the sys.messages catalog view.31Yes
EventClassintType of event = 58.27No
EventSequenceintSequence of a given event within the request.51No
EventSubClassintType of event subclass:

1: Statistics created/updated synchronously; TextData column indicates which statistics and whether they were created or updated

2: Asynchronous statistics update; job queued.

3: Asynchronous statistics update; job starting.

4: Asynchronous statistics update; job completed.
GroupIDintID of the workload group where the SQL Trace event fires.66Yes
HostNamenvarcharName of the computer on which the client is running. This data column is populated if the host name is provided by the client. To determine the host name, use the HOST_NAME function.8Yes
IndexIDintID for the index/statistics entry on the object affected by the event. To determine the index ID for an object, use the index_id column of the sys.indexes catalog view.24Yes
IntegerDataintNumber of statistics collections that were successfully updated.25Yes
IntegerData2intJob sequence number.55Yes
IsSystemintIndicates whether the event occurred on a system process or a user process. 1 = system, 0 = user.60Yes
LoginNamenvarcharName of the login of the user (either SQL Server security login or the Windows login credentials in the form of DOMAIN\username).11Yes
LoginSidimageSecurity identification number (SID) of the logged-in user. You can find this information in the sys.server_principals catalog view. Each SID is unique for each login in the server.41Yes
NTDomainNamenvarcharWindows domain to which the user belongs.7Yes
NTUserNamenvarcharWindows user name.6Yes
ObjectIDintSystem-assigned ID of the object.22Yes
RequestIDintThe ID of the request containing the statement.49Yes
ServerNamenvarcharName of the instance of SQL Server being traced.26No
SessionLoginNamenvarcharLogin name of the user that originated the session. For example, if you connect to SQL Server using Login1 and execute a statement as Login2, SessionLoginName shows Login1 and LoginName shows Login2. This column displays both SQL Server and Windows logins.64Yes
SPIDintID of the session on which the event occurred.12Yes
StartTimedatetimeTime at which the event started, if available.14Yes
Successint0 = error.

1 = success.

2 = skipped due to server throttling (MSDE).
TextDatantextContents of this column depends on whether statistics are updated synchronously (EventSubClass 1) or asynchronously (EventSubClass 2, 3, or 4):

1: Lists which statistics were updated/created

2, 3, or 4: NULL; IndexID column is populated with the index/statistics ID for statistics updated.
TransactionIDbigintSystem-assigned ID of the transaction.4Yes
TypeintType of job.57Yes

Extended Events
sp_trace_setevent (Transact-SQL)

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