DBA_HIST_SESSMETRIC_HISTORY

DBA_HIST_SESSMETRIC_HISTORY displays the history of several important session metrics.

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
`BEGIN_TIME`	`DATE`	`NOT NULL`	Begin time of the interval
`END_TIME`	`DATE`	`NOT NULL`	End time of the interval
`SESSID`	`NUMBER`	`NOT NULL`	Session ID
`SERIAL#`	`NUMBER`	`NOT NULL`	Session serial number
`INTSIZE`	`NUMBER`	`NOT NULL`	Interval size (in hundredths of a second)
`GROUP_ID`	`NUMBER`	`NOT NULL`	Group ID
`METRIC_ID`	`NUMBER`	`NOT NULL`	Metric ID
`METRIC_NAME`	`VARCHAR2(64)`	`NOT NULL`	Metric name
`VALUE`	`NUMBER`	`NOT NULL`	Metric Value
`METRIC_UNIT`	`VARCHAR2(64)`	`NOT NULL`	Unit of measurement