4.318 DBA_HIST_EVENT_HISTOGRAM

DBA_HIST_EVENT_HISTOGRAM displays event histogram historical statistics information.

This view contains snapshots of V$EVENT_HISTOGRAM.

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
WAIT_TIME_MILLI	NUMBER	NOT NULL	Wait time (in milliseconds)
WAIT_COUNT	NUMBER		Wait count
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$EVENT_HISTOGRAM"