sys.dm_exec_background_job_queue (Transact-SQL)
Returns a row for each query processor job that is scheduled for asynchronous (background) execution.
Column name |
Data type |
Description |
|---|---|---|
time_queued |
datetime |
Time when the job was added to the queue. |
job_id |
int |
Job identifier. |
database_id |
int |
Database on which the job is to execute. |
object_id1 |
int |
Value depends on the job type. For more information, see the Remarks section. |
object_id2 |
int |
Value depends on the job type. For more information, see the Remarks section. |
object_id3 |
int |
Value depends on the job type. For more information, see the Remarks section. |
object_id4 |
int |
Value depends on the job type. For more information, see the Remarks section. |
error_code |
int |
Error code if the job reinserted due to failure. NULL if suspended, not picked up, or completed. |
request_type |
smallint |
Type of the job request. |
retry_count |
smallint |
Number of times the job was picked from the queue and reinserted because of lack of resources or other reasons. |
in_progress |
smallint |
Indicates whether the job has started execution. 1 = Started 0 = Still waiting |
session_id |
smallint |
Session identifier. |
Permissions
Requires VIEW SERVER STATE permission on the server.
Remarks
This view returns information only for asynchronous update statistics jobs. For more information about asynchronous update statistics, see Using Statistics to Improve Query Performance.
The values of object_id1 through object_id4 depend on the type of the job request. The following table summarizes the meaning of these columns for the different job types.
Request type |
object_id1 |
object_id2 |
object_id3 |
object_id4 |
|---|---|---|---|---|
Asynchronous update statistics |
Table or view ID |
Statistics ID |
Not used |
Not used |
Examples
The following example returns the number of active asynchronous jobs in the background queue for each database in the instance of SQL Server.
SELECT DB_NAME(database_id) AS [Database], COUNT(*) AS [Active Async Jobs]
FROM sys.dm_exec_background_job_queue
WHERE in_progress = 1
GROUP BY database_id;
GO