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.

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.
`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.
`CONSUMED_CPU_TIME`	`NUMBER`	Cumulative amount of CPU time consumed by all sessions in the consumer group
`YIELDS`	`NUMBER`	Cumulative number of times that sessions in the consumer group had to yield CPU to other sessions because of quantum expiration
`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 cancelled 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
`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
`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 microseconds)
`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