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Oracle® Database Reference 10g Release 2 (10.2) Part Number B14237-02 |
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# DBA_HIST_WAITSTAT

`DBA_HIST_WAITSTAT` displays historical block contention statistics. This view contains snapshots of `V$WAITSTAT`.

Column | Datatype | NULL | Description
--- | --- | --- | ---
`SNAP_ID` | `NUMBER` |  | Unique snapshot ID
`DBID` | `NUMBER` |  | Database ID for the snapshot
`INSTANCE_NUMBER` | `NUMBER` |  | Instance number for the snapshot
`CLASS` | `VARCHAR2(18)` |  | Class of the block
`WAIT_COUNT` | `NUMBER` |  | Number of waits by the OPERATION for this CLASS of block
`TIME` | `NUMBER` |  | Sum of all wait times for all the waits by the OPERATION for this CLASS of block