TIMED_STATISTICS

Property	Description
Parameter type	Boolean
Default value	If `STATISTICS_LEVEL` is set to `TYPICAL` or `ALL`, then `true` If `STATISTICS_LEVEL` is set to `BASIC`, then `false`
Modifiable	`ALTER SESSION`, `ALTER SYSTEM`
Range of values	`true \| false`

TIMED_STATISTICS specifies whether or not statistics related to time are collected.

Values:

true

The statistics are collected and stored in trace files or displayed in the V$SESSTATS and V$SYSSTATS dynamic performance views.
false

The value of all time-related statistics is set to zero. This setting lets Oracle avoid the overhead of requesting the time from the operating system. Normally, TIMED_STATISTICS should be false.

On some systems with very fast timer access, Oracle might enable timing even if this parameter is set to false. On these systems, setting the parameter to true can sometimes produce more accurate statistics for long-running operations.

See Also:

Oracle Database Performance Tuning Guide for more information on setting this parameter and on performance diagnostic tools in general
Appendix E, " Statistics Descriptions" indicates which statistics depend on the setting of this parameter.