DBA_HIST_SHARED_SERVER_SUMMARY

DBA_HIST_SHARED_SERVER_SUMMARY displays historical information for shared servers. This includes information about shared server activity, the servers, common queues, and dispatcher queues. This view obtains information from V$SHARED_SERVER, V$DISPATCHER, V$CIRCUIT, and V$QUEUE, and is aggregated over all servers, dispatchers, queues, and circuits.

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
`NUM_SAMPLES`	`NUMBER`		Total number of samples
`SAMPLE_TIME`	`NUMBER`		Last sample timestamp
`SAMPLED_TOTAL_CONN`	`NUMBER`		Cumulative sum of total number of connections over all samples. To determine the average number of connections between two snapshots, divide the difference in `SAMPLED_TOTAL_CONN` by the difference in `NUM_SAMPLES`.
`SAMPLED_ACTIVE_CONN`	`NUMBER`		Cumulative sum of active number of connections over all samples. To determine the average number of active connections between two snapshots, divide the difference in `SAMPLED_ACTIVE_CONN` by the difference in `NUM_SAMPLES`.
`SAMPLED_TOTAL_SRV`	`NUMBER`		Cumulative sum of total number of servers over all samples. To determine the average number of servers between two snapshots, divide the difference in `SAMPLED_TOTAL_SRV` by the difference in `NUM_SAMPLES`.
`SAMPLED_ACTIVE_SRV`	`NUMBER`		Cumulative sum of active number of servers over all samples. To determine the average number of active servers between two snapshots, divide the difference in `SAMPLED_ACTIVE_SRV` by the difference in `NUM_SAMPLES`.
`SAMPLED_TOTAL_DISP`	`NUMBER`		Cumulative sum of total number of dispatchers over all samples. To determine the average number of dispatchers between two snapshots, divide the difference in `SAMPLED_TOTAL_DISP` by the difference in `NUM_SAMPLES`.
`SAMPLED_ACTIVE_DISP`	`NUMBER`		Cumulative sum of active number of dispatchers over all samples. To determine the average number of active dispatchers between two snapshots, divide the difference in `SAMPLED_ACTIVE_DISP` by the difference in `NUM_SAMPLES`.
`SRV_BUSY`	`NUMBER`		Total shared server busy time (in hundredths of a second)
`SRV_IDLE`	`NUMBER`		Total shared server idle time (in hundredths of a second)
`SRV_IN_NET`	`NUMBER`		Total shared server incoming network wait time (in hundredths of a second). This includes waits for receives and resets. This time is also included in `SRV_BUSY`.
`SRV_OUT_NET`	`NUMBER`		Total shared server outgoing network wait time (in hundredths of a second). This includes waits for sends and outbound connection requests. This time is also included in `SRV_BUSY`.
`SRV_MESSAGES`	`NUMBER`		Number of messages processed
`SRV_BYTES`	`NUMBER`		Total number of bytes in all messages
`CQ_WAIT`	`NUMBER`		Total time that all items in the common queue have waited (in hundredths of a second)
`CQ_TOTALQ`	`NUMBER`		Total number of items that have ever been in the common queue
`DQ_TOTALQ`	`NUMBER`		Total number of items that have ever been in a dispatcher queue