V$RSRC_CONS_GROUP_HISTORY

V$RSRC_CONS_GROUP_HISTORY displays a history of consumer group statistics for each entry in V$RSRC_PLAN_HISTORY that has a non-NULL plan.

When the STATISTICS_LEVEL is set to TYPICAL or ALL, this view contains information about CPU utilization and wait times even when no Resource Manager plan is set or when the Resource Manager plan does not monitor CPU or session resources.

Column	Datatype	Description
`SEQUENCE#`	`NUMBER`	A sequential counter that uniquely describes the `V$RSRC_PLAN_HISTORY` entry to which these consumer group statistics apply. When the instance is restarted, this value is reset to zero.
`ID`	`NUMBER`	Consumer group object ID (a unique number, consistent across database shutdowns and startups)
`NAME`	`VARCHAR2(30)`	Name of the consumer group
`REQUESTS`	`NUMBER`	Cumulative number of requests that were executed in the consumer group
`CPU_WAIT_TIME`	`NUMBER`	Cumulative amount of time that sessions waited for CPU because of resource management. This does not include waits due to latch or enqueue contention, I/O waits, and so on. When CPU resources are not being actively managed, this value is set to zero.
`CPU_WAITS`	`NUMBER`	Cumulative number of times all sessions in the consumer group had to wait for CPU because of resource management. This does not include waits due to latch or enqueue contention, I/O waits, and so on. When CPU resources are not being actively managed, this value is set to zero.
`CONSUMED_CPU_TIME`	`NUMBER`	Cumulative amount of CPU time consumed by all sessions in the consumer group (in milliseconds)
`YIELDS`	`NUMBER`	Cumulative number of times that sessions in the consumer group had to yield CPU to other sessions because of quantum expiration. When CPU resources are not being actively managed, this value is set to zero.
`CPU_DECISIONS`	`NUMBER`	Percentage of CPU decisions for which the consumer group was present. When CPU resources are not being actively managed, this value is set to zero.
`CPU_DECISIONS_EXCLUSIVE`	`NUMBER`	Percentage of the CPU decisions for which the consumer group was present and was the only consumer group present. When CPU resources are not being actively managed, this value is set to zero.
`CPU_DECISIONS_WON`	`NUMBER`	Percentage of the CPU decisions that the consumer group won. When CPU resources are not being actively managed, this value is set to zero.
`ACTIVE_SESS_LIMIT_HIT`	`NUMBER`	Number of times that sessions in the consumer group were queued because the consumer group reached its active session limit
`UNDO_LIMIT_HIT`	`NUMBER`	Number of times that queries in the consumer group were canceled because the consumer group reached its `UNDO_POOL` limit
`SWITCHES_IN_CPU_TIME`	`NUMBER`	Number of switches into the consumer group because of the Resource Manager plan's `SWITCH_TIME` limit
`SWITCHES_OUT_CPU_TIME`	`NUMBER`	Number of switches out of the consumer group because of the Resource Manager plan's `SWITCH_TIME` limit
`SWITCHES_IN_IO_MEGABYTES`	`NUMBER`	Number of switches into the consumer group because of the Resource Manager plan's `SWITCH_IO_MEGABYTES` limit
`SWITCHES_OUT_IO_MEGABYTES`	`NUMBER`	Number of switches out of the consumer group because of the Resource Manager plan's `SWITCH_IO_MEGABYTES` limit
`SWITCHES_IN_IO_REQUESTS`	`NUMBER`	Number of switches into the consumer group because of the Resource Manager plan's `SWITCH_IO_REQS` limit
`SWITCHES_OUT_IO_REQUESTS`	`NUMBER`	Number of switches out of the consumer group because of the Resource Manager plan's `SWITCH_IO_REQS` limit
`SWITCHES_IN_IO_LOGICAL`	`NUMBER`	Number of switches into the consumer group because of the Resource Manager plan's `SWITCH_IO_LOGICAL` limit
`SWITCHES_OUT_IO_LOGICAL`	`NUMBER`	Number of switches out of the consumer group because of the Resource Manager plan's `SWITCH_IO_LOGICAL` limit
`SWITCHES_IN_ELAPSED_TIME`	`NUMBER`	Number of switches into the consumer group because of the Resource Manager plan's `SWITCH_ELAPSED_TIME` limit
`SWITCHES_OUT_ELAPSED_TIME`	`NUMBER`	Number of switches out of the consumer group because of the Resource Manager plan's `SWITCH_ELAPSED_TIME` limit
`SQL_CANCELED`	`NUMBER`	Number of times that SQL queries running in the consumer group were aborted because they exceeded the Resource Manager plan's `SWITCH_TIME` limit and `CANCEL_SQL` was specified as the Resource Manager plan's `SWITCH_GROUP`
`ACTIVE_SESS_KILLED`	`NUMBER`	Number of times that sessions running in the consumer group were terminated because they exceeded the Resource Manager plan's `SWITCH_TIME` limit and `KILL_SESSION` was specified as the Resource Manager plan's `SWITCH_GROUP`
`IDLE_SESS_KILLED`	`NUMBER`	Number of times that sessions in the consumer group were killed because they were idle for too long (reached `MAX_IDLE_TIME`)
`IDLE_BLKR_SESS_KILLED`	`NUMBER`	Number of times that sessions in the consumer group were killed because they were idle too long (reached `MAX_IDLE_BLOCKER_TIME`) and were blocking other sessions
`QUEUED_TIME`	`NUMBER`	Total amount of time that sessions in the consumer group have spent in the QUEUED state because of the active session limit (in milliseconds)
`QUEUE_TIME_OUTS`	`NUMBER`	Number of times that requests from sessions in the consumer group timed out because they were queued for too long (reached `QUEUEING_P1`)
`IO_SERVICE_TIME`	`NUMBER`	Cumulative I/O wait time (in milliseconds)
`IO_SERVICE_WAITS`	`NUMBER`	Total number of wait requests
`SMALL_READ_MEGABYTES`	`NUMBER`	Number of single block megabytes read
`SMALL_WRITE_MEGABYTES`	`NUMBER`	Number of single block megabytes written
`LARGE_READ_MEGABYTES`	`NUMBER`	Number of multiblock megabytes read
`LARGE_WRITE_MEGABYTES`	`NUMBER`	Number of multiblock megabytes written
`SMALL_READ_REQUESTS`	`NUMBER`	Number of single block read requests
`SMALL_WRITE_REQUESTS`	`NUMBER`	Number of single block write requests
`LARGE_READ_REQUESTS`	`NUMBER`	Number of multiblock read requests
`LARGE_WRITE_REQUESTS`	`NUMBER`	Number of multiblock write requests
`PQS_COMPLETED`	`NUMBER`	Total number of completed parallel statements in the consumer group
`PQ_SERVERS_USED`	`NUMBER`	Total number of parallel servers used by completed parallel statements in the consumer group
`PQS_QUEUED`	`NUMBER`	Number of times that sessions in the consumer group were queued when trying to run parallel statements
`PQ_ACTIVE_TIME`	`NUMBER`	Cumulative sum of the parallel active times for all completed parallel statements in the consumer group (in milliseconds)
`PQ_QUEUED_TIME`	`NUMBER`	Total amount of time that sessions in the consumer group were queued when trying to run parallel statements (in milliseconds)
`PQ_QUEUE_TIME_OUTS`	`NUMBER`	Number of times that parallel statements from sessions in the consumer group timed out because their queue time exceeded the Resource Manager plan's `PARALLEL_QUEUE_TIMEOUT` limit
`CON_ID`	`NUMBER`	The ID of the container to which the data pertains. Possible values include: `0`: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs. `1`: This value is used for rows containing data that pertain to only the root n: Where n is the applicable container ID for the rows containing data