经验丰富的老员工希望能够每天为数据库生成1个AWR报告，以便于后期分析数据库的性能变化，手动生成太麻烦，查了一下资料，发现可以自动生成，过程如下。
数据库环境：11gR2 RAC(双节点)
AWR报告：由于是RAC数据库，希望生成每个节点的报告及全局报告，时间段为：第一天的0点~第二天的0点。
（1）在oracle服务器上创建路径
server2$[/home/oracle]mkdir awrreport
（2）创建directory并授权（使用sys账户执行）
create or replace directory DIR_AWRREPORT as '/home/oracle/awrreport';
grant read,write on directory DIR_AWRREPORT to mydba;
grant select on v_$database to mydba;
grant select on dba_hist_snapshot to mydba;
grant execute on sys.dbms_workload_repository to mydba;
（3）编写脚本（使用监控账户mydba执行）
CREATE OR REPLACE PROCEDURE auto_awrreport
AS
start_snap number;
end_snap number;
rpt_interval number := 24;
start_time varchar2(14);
end_time varchar2(14);
awr_file utl_file.file_type;
v_dbid number;
v_dbname varchar2(20);
begin
select dbid,name into v_dbid,v_dbname from v$database;
select max(snap_id) into end_snap from dba_hist_snapshot;
start_snap := end_snap-rpt_interval;
select to_char(end_interval_time-rpt_interval/24, 'yyyymmddhh24'),to_char(end_interval_time, 'yyyymmddhh24')
into start_time,end_time
from dba_hist_snapshot
where snap_id = end_snap and instance_number = 1;
awr_file := utl_file.fopen('DIR_AWRREPORT',lower(v_dbname)||'_1_'||start_time||'_'||end_time||'.html', 'a',32767);
for awr_info in (select output from table(dbms_workload_repository.awr_report_html(v_dbid,1,start_snap,end_snap,0))) loop
UTL_FILE.put_line(awr_file,awr_info.output);
end loop;
utl_file.fclose(awr_file);
awr_file := utl_file.fopen('DIR_AWRREPORT',lower(v_dbname)||'_2_'||start_time||'_'||end_time||'.html', 'a',32767);
for awr_info in (select output from table(dbms_workload_repository.awr_report_html(v_dbid,2,start_snap,end_snap,0))) loop
UTL_FILE.put_line(awr_file,awr_info.output);
end loop;
utl_file.fclose(awr_file);
awr_file := utl_file.fopen('DIR_AWRREPORT',lower(v_dbname)||'_global_'||start_time||'_'||end_time||'.html', 'a',32767);
for awr_info in (select output from table(dbms_workload_repository.awr_global_report_html(l_dbid => v_dbid,l_inst_num => '',l_bid => start_snap,l_eid => end_snap,l_options => 0))) loop
UTL_FILE.put_line(awr_file,awr_info.output);
end loop;
utl_file.fclose(awr_file);
end auto_awrreport;
（4）授予监控用户执行procedure权限（使用sys账户）
grant execute on mydba.auto_awrreport to mydba;
（5）创建job，每天晚上12：30执行（监控账户）
declare
job1 number;
begin
sys.dbms_job.submit(job => job1,
what => 'auto_awrreport;',
next_date => sysdate,
interval => 'TRUNC(SYSDATE+1) + 30/(24*60)',
instance => 2
);
end;