v$system_event

This view displays the count (total_waits) of all since of the .

If is set to true, the sum of the for all are also displayed in the column time_waited.

The unit of time_waited is one hundreth of a second. Since 10g, an additional column (time_waited_micro) measures wait times in millionth of a second.

total_waits where event='' is equal the sum of count in .

can be used to break down waits on the wait event.

While this view totals all events in an instance, breaks it down to all currently connected .

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v$system_event解析

v$system_event

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