DBA_HIST_OSSTAT

DBA_HIST_OSSTAT displays historical operating system statistics. This view contains snapshots of V$OSSTAT.

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
`STAT_ID`	`NUMBER`	`NOT NULL`	Statistic ID
`STAT_NAME`	`VARCHAR2(64)`	`NOT NULL`	Statistic name
`VALUE`	`NUMBER`		Statistic value
`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