DBA_HIST_DISPATCHER

DBA_HIST_DISPATCHER displays historical information for each dispatcher process present at the time of the snapshot. This view contains snapshots of information from V$DISPATCHER and V$QUEUE.

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
`NAME`	`VARCHAR2(4)`	`NOT NULL`	Name of the dispatcher process
`SERIAL#`	`NUMBER`		Serial number of the dispatcher process
`IDLE`	`NUMBER`		Total idle time for the dispatcher (in hundredths of a second)
`BUSY`	`NUMBER`		Total busy time for the dispatcher (in hundredths of a second)
`WAIT`	`NUMBER`		Total time that all items in the dispatcher queue have waited (in hundredths of a second). Divide by `TOTALQ` for average wait per item.
`TOTALQ`	`NUMBER`		Total number of items that have ever been in the dispatcher queue
`SAMPLED_TOTAL_CONN`	`NUMBER`		Cumulative sum of total number of connections to the dispatcher over all samples. To determine the average number of connections to the dispatcher between two snapshots, divide the difference in `SAMPLED_TOTAL_CONN` by the difference in `NUM_SAMPLES` (obtained from `DBA_HIST_SHARED_SERVER_SUMMARY`).