DBA_OPTSTAT_OPERATIONS

DBA_OPTSTAT_OPERATIONS contains a history of statistics operations performed at the schema and database level using the DBMS_STATS package.

Column	Datatype	NULL	Description
OPERATION	VARCHAR2(64)		Operation name
TARGET	VARCHAR2(64)		Target on which the operation was performed
START_TIME	TIMESTAMP(6) WITH TIME ZONE		Time at which the operation started
END_TIME	TIMESTAMP(6) WITH TIME ZONE		Time at which the operation ended

Note:

1.

select * from DBA_OPTSTAT_OPERATIONS;

OPERATION	TARGET	START_TIME	END_TIME
gather_database_stats(auto)		2008-09-18 10:00:04.094807 PM -07:00	2008-09-19 2:19:30.097811 AM -07:00
gather_database_stats(auto)		2008-09-17 10:00:03.507576 PM -07:00	2008-09-18 1:47:10.373073 AM -07:00
gather_database_stats(auto)		2008-09-16 10:00:02.837555 PM -07:00	2008-09-16 11:54:34.649091 PM -07:00
gather_database_stats(auto)		2008-09-15 10:00:02.673267 PM -07:00	2008-09-15 11:45:36.426822 PM -07:00
gather_database_stats(auto)		2008-09-13 6:00:05.952363 AM -07:00	2008-09-13 6:44:52.736266 AM -07:00
gather_database_stats(auto)		2008-09-12 10:00:02.384919 PM -07:00	2008-09-13 12:52:39.275995 AM -07:00

Oracle data dictionary views

Oracle dynamic performance views