SQL> select execution_mode,last_cycle_time,sysdate  from v$sys_report_stats;

EXECUTION_MO LAST_CYCLE_TIME     SYSDATE
------------ ------------------- -------------------
REGULAR      2017-11-22 15:58:14 2017-11-22 15:58:18

SQL> exec DBMS_AUTO_REPORT.start_report_capture;

PL/SQL procedure successfully completed.

SQL> select execution_mode,last_cycle_time,sysdate  from v$sys_report_stats;

EXECUTION_MO LAST_CYCLE_TIME     SYSDATE
------------ ------------------- -------------------
FULL_CAPTURE 2017-11-22 15:56:13 2017-11-22 15:57:52

SQL> @param_ report_cap
NAME                                   VALUE   TYPE    DESCRIPTION
-------------------------------------- ------- ------- ------------------------------------------------------------
_report_capture_cycle_time             0       number  Time (in sec) between two cycles of report capture daemon
_report_capture_dbtime_percent_cutoff  50      number  100X Percent of system db time daemon is allowed over 10 cycles                                            
_report_capture_recharge_window        10      number  No of report capture cycles after which db time is recharged
_report_capture_timeband_length        1       number  Length of time band (in hours) in the reports time bands table