原文鏈接：https://blog.csdn.net/gaobudong1234/article/details/73771104
--如果需要的話DBA可以通過DBMS_WORKLOAD_REPOSITORY過程手動創建、刪除或修改snapshots.
調用DBMS_WORKLOAD_REPOSITORY包需要擁有DBA權限。
--1.手動創建Snapshots 手動創建Snapshots通過DBMS_WORKLOAD_REPOSITORY.CREATE_SNAPSHOT過程
--例如
exec dbms_workload_repository.create_snapshot();
-- 然後可以通過 DBA_HIST_SNAPSHOT 視圖查看剛剛創建的Snapshots信息。
SELECT * FROM DBA_HIST_SNAPSHOT;
-- 2手動刪除Snapshots
--刪除Snapshots是使用DBMS_WORKLOAD_REPOSITORY包的另一個過程DROP_SNAPSHOT_RANGE 該過程在執行時可以通過指定snap_id的範圍的方式一次刪除多個Snapshot
--例如
select count(0) from dba_hist_snapshot where snap_id between 6770 and 6774;
select max(snap_id) from dba_hist_snapshot;
select dbid from v$database;
exec dbms_workload_repository.drop_snapshot_range(low_snap_id => 6770,high_snap_id => 6774,dbid => 4059638244);
--或者
begin
dbms_workload_repository.drop_snapshot_range(
low_snap_id => 6770,
high_snap_id => 6774,
dbid => 4059638244);
end;
select count(0) from dba_hist_snapshot where snap_id between 6770 and 6774;
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原文鏈接：https://blog.csdn.net/gaobudong1234/article/details/73771104