sys-dm-exec-dms-workers-transact-sql.md

title	description	author	ms.author	ms.date	ms.service	ms.subservice	ms.topic	f1_keywords	helpviewer_keywords	dev_langs	monikerRange
sys.dm_exec_dms_workers (Transact-SQL)	sys.dm_exec_dms_workers (Transact-SQL)	rwestMSFT	randolphwest	11/04/2019	sql	system-objects	reference	SYS.DM_EXEC_DMS_WORKERS_TSQL DM_EXEC_DMS_WORKERS_TSQL DM_EXEC_DMS_WORKERS	PolyBase,views PolyBase dm_exec_dms_workers management view sys.dm_exec_dms_workers management view	TSQL	>=sql-server-2016||>=sql-server-linux-2017||=azuresqldb-mi-current

sys.dm_exec_dms_workers (Transact-SQL)

[!INCLUDE sqlserver2016]

Holds information about all workers completing DMS steps.

This view shows the data for the last 1000 requests and active requests; active requests always have the data present in this view.

Column Name	Data Type	Description	Range
execution_id	nvarchar(32)	Query that this DMS worker is part of. execution_id, step_index, and dms_step_index form the key for this view.
step_index	int	Query step this DMS worker is part of.	See step index in sys.dm_exec_distributed_request_steps (Transact-SQL).
dms_step_index	int	Step in the DMS plan that this worker is running.	See sys.dm_exec_dms_workers (Transact-SQL)
compute_node_id	int	Node that the worker is running on.	See sys.dm_exec_compute_nodes (Transact-SQL).
distribution_id	int
type	nvarchar(32)	Type of DMS worker thread this entry represents.	'DIRECT_CONVERTER', 'DIRECT_READER', 'FILE_READER', 'HASH_CONVERTER', 'HASH_READER', 'ROUNDROBIN_CONVERTER', 'EXPORT_READER', 'EXTERNAL_READER', 'EXTERNAL_WRITER', 'PARALLEL_COPY_READER', 'REJECT_WRITER', 'WRITER'
status	nvarchar(32)	Status of this step	'Pending', 'Running', 'Complete', 'Failed', 'UndoFailed', 'PendingCancel', 'Cancelled', 'Undone', 'Aborted'
bytes_per_sec	bigint
bytes_processed	bigint
rows_processed	bigint
start_time	datetime	Time at which the step started execution	Smaller or equal to current time and larger or equal to end_compile_time of the query to which this step belongs.
end_time	datetime	Time at which this step completed execution, was cancelled, or failed.	Smaller or equal to current time and larger or equal to start_time, set to NULL for steps currently in execution or queued.
total_elapsed_time	int	Total amount of time the query step has been executing, in milliseconds	Between 0 and the difference between end_time and start_time. 0 for queued steps.
cpu_time	bigint
query_time	int
buffers_available	int
dms_cpid	int
sql_spid	int
error_id	nvarchar(36)
source_info	nvarchar(4000)
destination_info	nvarchar(4000)
command	nvarchar(4000)
compute_pool_id	int	Unique identifier for the pool.

See Also

PolyBase troubleshooting with dynamic management views
Dynamic Management Views and Functions (Transact-SQL)
Database Related Dynamic Management Views (Transact-SQL)