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Oracle® Database Reference 10g Release 2 (10.2) Part Number B14237-02 |
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# 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 for the snapshot
`INSTANCE_NUMBER` | `NUMBER` | `NOT NULL` | Instance number for the snapshot
`WAIT_CLASS_ID` | `NUMBER` | `NOT NULL` | Identifier for the class of the wait event
`WAIT_CLASS` | `VARCHAR2(64)` |  | Name for 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` | Database time spent in the wait
`TIME_WAITED` | `NUMBER` | `NOT NULL` | Time waited during this interval
`WAIT_COUNT` | `NUMBER` | `NOT NULL` | Number of times waited