DBA_HIST_WAITCLASSMET_HISTORY

DBA_HIST_WAITCLASSMET_HISTORY displays the history of the wait event class metric data kept by the Workload Repository.

Column	Datatype	NULL	Description
SNAP_ID	NUMBER	NOT NULL	Unique snapshot ID
DBID	NUMBER	NOT NULL	Database ID of the snapshot
INSTANCE_NUMBER	NUMBER	NOT NULL	Instance number of the snapshot
WAIT_CLASS_ID	NUMBER	NOT NULL	Identifier of the class of the wait event
WAIT_CLASS	VARCHAR2(64)		Name of the class of the wait event
BEGIN_TIME	DATE	NOT NULL	Begin time of the interval
END_TIME	DATE	NOT NULL	End time of the interval
INTSIZE	NUMBER	NOT NULL	Interval size (in hundredths of a second)
GROUP_ID	NUMBER	NOT NULL	Metric group ID
AVERAGE_WAITER_COUNT	NUMBER	NOT NULL	Average waiter count
DBTIME_IN_WAIT	NUMBER	NOT NULL	Percent of database time spent in the wait
TIME_WAITED	NUMBER	NOT NULL	Time waited during the interval (in microseconds)
WAIT_COUNT	NUMBER	NOT NULL	Number of times waited
TIME_WAITED_FG	NUMBER		Time waited (in hundredths of a second), from foreground sessions
WAIT_COUNT_FG	NUMBER		Number of times waited, from foreground sessions
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