生成AWR报告
sqlplus / as sysdba
@/${ORACLE_HOME}/.../RDBMS/ADMIN/awrrpt.sql
依次输入：
Specify the Report Type: html
Specify the number of days of snapshots to choose from: 1 -- 代表当天
Specify the Begin and End Snapshot Ids: 起止的Snap Id
Specify the Report Name: E:\filename.html
