AWR快照管理

创建快照：

SQL> exec dbms_workload_repository.create_snapshot();

删除快照：

SQL> exec dbms_workload_repository.drop_snapshot_range(low_snap_id=>2542,high_snap_id=>2544,dbid=>1725496767);

修改快照设置：

SQL> exec dbms_workload_repository.modify_snapshot_settings(retention=>43200,interval=>30,topsql=>100,dbid=>1725496767);

查看快照：

SQL> select snap_id,dbid,instance_number,startup_time,begin_interval_time,end_interval_time,flush_elapsed,snap_level,error_count,snap_flag,snap_timezone from dba_hist_snapshot;

 SNAP_ID       DBID INSTANCE_NUMBER STARTUP_TIME              BEGIN_INTERVAL_TIME       END_INTERVAL_TIME         FLUSH_ELAPSED      SNAP_LEVEL ERROR_COUNT  SNAP_FLAG SNAP_TIMEZONE
-------- ---------- --------------- ------------------------- ------------------------- ------------------------- ------------------ ---------- ----------- ---------- -------------
    2412 1725496767               1 26-OCT-15 08.41.58.000 AM 30-OCT-15 09.00.04.802 PM 30-OCT-15 10.00.06.349 PM +00000 00:00:00.1           1           0          0 +0 08:00:00

SQL>