DBA_HIST_BG_EVENT_SUMMARY

DBA_HIST_BG_EVENT_SUMMARY displays the historical summary background event activity.

This view contains snapshots from V$SESSION_EVENT.

Column	Datatype	NULL	Description
SNAP_ID	NUMBER	NOT NULL	Unique snapshot ID
DBID	NUMBER	NOT NULL	Database ID for the snapshot
INSTANCE_NUMBER	NUMBER	NOT NULL	Instance number for the snapshot
EVENT_ID	NUMBER	NOT NULL	Identifier of the wait event
EVENT_NAME	VARCHAR2(64)	NOT NULL	Name of the wait event
WAIT_CLASS_ID	NUMBER		Identifier of the class of the wait event
WAIT_CLASS	VARCHAR2(64)		Name of the class of the wait event
TOTAL_WAITS	NUMBER		Total number of waits for the event
TOTAL_TIMEOUTS	NUMBER		Total number of timeouts for the event
TIME_WAITED_MICRO	NUMBER		Total amount of time waited for the event (in microseconds)
CON_DBID	NUMBER		The database ID of the PDB for the sampled session
CON_ID	NUMBER		The ID of the container that CON_DBID identifies. 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

See Also: “V$SESSION_EVENT”