V$SYSMETRIC_SUMMARY displays a summary of all system Metric values for the long-duration system metrics. The average, maximum value, minimum value, and the value of one standard deviation for the last hour are displayed for each metric item.
| Column | Datatype | Description | 
|---|---|---|
| BEGIN_TIME | DATE | Begin time of the interval | 
| END_TIME | DATE | End time of the interval | 
| INTSIZE_CSEC | NUMBER | Interval size (in hundredths of a second) | 
| GROUP_ID | NUMBER | Metric group ID | 
| METRIC_ID | NUMBER | Metric ID | 
| METRIC_NAME | VARCHAR2(64) | Metric name | 
| NUM_INTERVAL | NUMBER | Number of intervals observed | 
| MAXVAL | NUMBER | Maximum value observed | 
| MINVAL | NUMBER | Minimum value observed | 
| AVERAGE | NUMBER | Average value over the period | 
| STANDARD_DEVIATION | NUMBER | One standard deviation | 
| METRIC_UNIT | VARCHAR2(64) | Metric unit description |