sys.dm_resource_governor_workload_groups (Transact-SQL)
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.
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. |
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. .gif "Note") 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:
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. |
Remarks
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).
Permissions
Requires VIEW SERVER STATE permission.