Returns workload group statistics and the current in-memory configuration of the workload group. This view can be joined with sys.dm_resource_governor_resource_pools to get the resource pool name.
To call this from Azure SQL Data Warehouse or Parallel Data Warehouse, use the name sys.dm_pdw_nodes_resource_governor_workload_groups.
|Column name||Data type||Description|
|group_id||int||ID of the workload group. Is not nullable.|
|name||sysname||Name of the workload group. Is not nullable.|
|pool_id||int||ID of the resource pool. Is not nullable.|
|external_pool_id||int||Applies to: SQL Server 2016 (13.x) through SQL Server 2017.
ID of the external resource pool. Is not nullable.
|statistics_start_time||datetime||Time that statistics collection was reset for the workload group. Is not nullable.|
|total_request_count||bigint||Cumulative count of completed requests in the workload group. Is not nullable.|
|total_queued_request_count||bigint||Cumulative count of requests queued after the GROUP_MAX_REQUESTS limit was reached. Is not nullable.|
|active_request_count||int||Current request count. Is not nullable.|
|queued_request_count||int||Current queued request count. Is not nullable.|
|total_cpu_limit_violation_count||bigint||Cumulative count of requests exceeding the CPU limit. Is not nullable.|
|total_cpu_usage_ms||bigint||Cumulative CPU usage, in milliseconds, by this workload group. Is not nullable.|
|max_request_cpu_time_ms||bigint||Maximum CPU usage, in milliseconds, for a single request. Is not nullable.
Note: This is a measured value, unlike request_max_cpu_time_sec, which is a configurable setting. For more information, see CPU Threshold Exceeded Event Class.
|blocked_task_count||int||Current count of blocked tasks. Is not nullable.|
|total_lock_wait_count||bigint||Cumulative count of lock waits that occurred. Is not nullable.|
|total_lock_wait_time_ms||bigint||Cumulative sum of elapsed time, in milliseconds, a lock is held. Is not nullable.|
|total_query_optimization_count||bigint||Cumulative count of query optimizations in this workload group. Is not nullable.|
|total_suboptimal_plan_generation_count||bigint||Cumulative count of suboptimal plan generations that occurred in this workload group due to memory pressure. Is not nullable.|
|total_reduced_memgrant_count||bigint||Cumulative count of memory grants that reached the maximum query size limit. Is not nullable.|
|max_request_grant_memory_kb||bigint||Maximum memory grant size, in kilobytes, of a single request since the statistics were reset. Is not nullable.|
|active_parallel_thread_count||bigint||Current count of parallel thread usage. Is not nullable.|
|importance||sysname||Current configuration value for the relative importance of a request in this workload group. Importance is one of the following, with Medium being the default: Low, Medium, or High.
Is not nullable.
|request_max_memory_grant_percent||int||Current setting for the maximum memory grant, as a percentage, for a single request. Is not nullable.|
|request_max_cpu_time_sec||int||Current setting for maximum CPU use limit, in seconds, for a single request. Is not nullable.|
|request_memory_grant_timeout_sec||int||Current setting for memory grant time-out, in seconds, for a single request. Is not nullable.|
|group_max_requests||int||Current setting for the maximum number of concurrent requests. Is not nullable.|
|max_dop||int||Maximum degree of parallelism for the workload group. The default value, 0, uses global settings. Is not nullable.|
|pdw_node_id||int||Applies to: Azure SQL Data Warehouse, Parallel Data Warehouse
The identifier for the node that this distribution is on.
This dynamic management view shows the in-memory configuration. To see the stored configuration metadata, use the sys.resource_governor_workload_groups catalog view.
When ALTER RESOURCE GOVERNOR RESET STATISTICS is successfully executed, the following counters are reset: statistics_start_time, total_request_count, total_queued_request_count, total_cpu_limit_violation_count, total_cpu_usage_ms, max_request_cpu_time_ms, total_lock_wait_count, total_lock_wait_time_ms, total_query_optimization_count, total_suboptimal_plan_generation_count, total_reduced_memgrant_count, and max_request_grant_memory_kb. statistics_start_time is set to the current system date and time, the other counters are set to zero (0).
Requires VIEW SERVER STATE permission.
Dynamic Management Views and Functions (Transact-SQL)
ALTER RESOURCE GOVERNOR (Transact-SQL)
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