1、手动创建Snapshots
exec dbms_workload_repository.create_snapshot();
--或者
BEGIN
DBMS_WORKLOAD_REPOSITORY.CREATE_SNAPSHOT ();
END; 2、手动删除Snapshots
exec dbms_workload_repository.drop_snapshot_range(low_snap_id => 6770,high_snap_id => 6774,dbid => 4059638244);
OR
BEGIN
dbms_workload_repository.drop_snapshot_range(low_snap_id => 6770,
high_snap_id => 6774,
dbid => 4059638244);
END; 这种方法删除是通过delete的会产生大量redo，建议直接删除相关分区
3、修改快照设置
------查看快照策略
set linesize 1000 pagesize 500
col SNAP_INTERVAL for a20
col RETENTION for a30
select * from dba_hist_wr_control;
------生成修改快照策略的语句
set linesize 1000 pagesize 5000
col cmd for a200
SELECT 'exec DBMS_WORKLOAD_REPOSITORY.MODIFY_SNAPSHOT_SETTINGS(retention => 16*24*60,INTERVAL => 30,dbid => ' || DBID ||
' );' cmd
FROM dba_hist_wr_control;
------修改快照策略
BEGIN
DBMS_WORKLOAD_REPOSITORY.MODIFY_SNAPSHOT_SETTINGS(retention => 18*24*60,
INTERVAL => 30,
dbid => 1328382724);
END;
/ 4、AWR生成常用脚本
--生成单实例 AWR 报告：
@$ORACLE_HOME/rdbms/admin/awrrpt.sql
--生成 Oracle RAC AWR 报告：
@$ORACLE_HOME/rdbms/admin/awrgrpt.sql
--生成 RAC 环境中特定数据库实例的 AWR 报告:
@$ORACLE_HOME/rdbms/admin/awrrpti.sql
--生成 Oracle RAC 环境中多个数据库实例的 AWR 报告的方法：
@$ORACLE_HOME/rdbms/admin/awrgrpti.sql
--生成 SQL 语句的 AWR 报告：
@$ORACLE_HOME/rdbms/admin/awrsqrpt.sql
--生成特定数据库实例上某个 SQL 语句的 AWR 报告：
@$ORACLE_HOME/rdbms/admin/awrsqrpi.sql
--生成单实例 AWR 时段对比报告
@$ORACLE_HOME/rdbms/admin/awrddrpt.sql
--生成 Oracle RAC AWR 时段对比报告
@$ORACLE_HOME/rdbms/admin/awrgdrpt.sql
--生成特定数据库实例的 AWR 时段对比报告
@$ORACLE_HOME/rdbms/admin/awrddrpi.sql
--生成 Oracle RAC 环境下特定（多个）数据库实例的 AWR 时段对比报告
@$ORACLE_HOME/rdbms/admin/awrgdrpi.sql 5、快速收集AWR/ASH/ADDM脚本
我有几张阿里云幸运券分享给你，用券购买或者升级阿里云相应产品会有特惠惊喜哦！把想要买的产品的幸运券都领走吧！快下手，马上就要抢光了。
-------快速收集AWR
declare
begin_time_date date := to_date('20141130 23:00:00', 'yyyymmdd hh24:mi:ss') ;
end_time_date date := to_date('20141203 18:00:00', 'yyyymmdd hh24:mi:ss') ;
begin
dbms_output.put_line('set linesize 2000');
dbms_output.put_line('set pagesize 50000');
dbms_output.put_line('set head off');
for r in (select *
from sys.WRM$_SNAPSHOT t
where t.begin_interval_time >begin_time_date
and t.begin_interval_time< end_time_date
and t.dbid=3628304518
order by t.snap_id, t.instance_number)
loop
dbms_output.put_line('spool awrrpt_' || r.instance_number || '_' ||
to_char(r.begin_interval_time+1/24,'mmdd_hh24mi') || '_' ||to_char(r.end_interval_time+1/24,'mmdd_hh24mi') || '.html');
dbms_output.put_line('select *
from table
(dbms_workload_repository.awr_report_html(' ||
r.dbid || ',' || r.instance_number || ',' ||
r.snap_id || ',' || (r.snap_id + 1) || ',0));');
dbms_output.put_line('spool off');
end loop;
end;
---------快速收集ASH
declare
begin_time_date date := to_date('20141130 23:00:00',
'yyyymmdd hh24:mi:ss');
end_time_date date := to_date('20141203 13:00:00',
'yyyymmdd hh24:mi:ss');
interval_minutes number := 60;
begin
dbms_output.put_line('set linesize 2000');
dbms_output.put_line('set pagesize 50000');
dbms_output.put_line('set head off');
for r in (select db.DBID,
ins.INSTANCE_NUMBER,
begin_time_date + interval_minutes * (lv - 1) / 1440 begin_time_date,
begin_time_date + interval_minutes * lv / 1440,
'yyyymmdd hh24:mi:ss' end_time_date,
to_char(begin_time_date + 60 * (lv - 1) / 1440,
'yyyymmddhh24mi') begin_time,
to_char(begin_time_date + 60 * lv / 1440,
'yyyymmddhh24miss') end_time
from (select /*+ no_merge*/
level lv
from dual
connect by level <= (end_time_date - begin_time_date) * 60 * 24 /
interval_minutes),
gv$instance ins,
v$database db) loop
dbms_output.put_line('spool ashrpt_' || to_char(r.instance_number) || '_' ||
r.begin_time || '-' || r.end_time || '.html');
dbms_output.put_line('select output from table(dbms_workload_repository.ash_report_html( ' ||
r.dbid || ' , ' || r.instance_number || ' , ' ||
'to_date(' || '''' || r.begin_time ||
''', ''yyyymmddhh24miss''' || ')' || ' , ' ||
'to_date(' || '''' || r.end_time ||
''', ''yyyymmddhh24miss''' || ')));');
dbms_output.put_line('spool off ');
end loop;
end;
---------------快速收集ADDM
declare
begin_time_date date := to_date('20141109 15:00:00', 'yyyymmdd hh24:mi:ss') ;
end_time_date date := to_date('20141109 19:00:00', 'yyyymmdd hh24:mi:ss') ;
begin
dbms_output.put_line('set linesize 100');
dbms_output.put_line('set pagesize 50000');
dbms_output.put_line('set head off');
dbms_output.put_line('serveroutput ON SIZE UNLIMITED ');
dbms_output.put_line('spool addm.txt');
for r in (select *
from sys.WRM$_SNAPSHOT t
where t.begin_interval_time >=begin_time_date
and t.begin_interval_time<= end_time_date
order by t.snap_id, t.instance_number)
loop
dbms_output.put_line('declare
id number ;
name varchar2(100) ;
v_dec varchar2(200) :='||'''addm_'||to_char(r.snap_id)||'_'||to_char(r.snap_id+1)||''';');
dbms_output.put_line( 'begin ') ;
dbms_output.put_line( 'dbms_advisor.create_task(''ADDM'',id,name,v_dec,null);');
dbms_output.put_line( 'dbms_advisor.set_task_parameter(name, '||'''START_SNAPSHOT'','||r.snap_id||');') ;
dbms_output.put_line( 'dbms_advisor.set_task_parameter(name, ' ||'''END_SNAPSHOT'','||to_char(r.snap_id+1)||');') ;
dbms_output.put_line( 'dbms_advisor.set_task_parameter(name, '||'''INSTANCE'','||r.instance_number||');') ;
dbms_output.put_line( 'dbms_advisor.set_task_parameter(name, '||'''DB_ID'','||r.dbid||');') ;
dbms_output.put_line( 'dbms_advisor.execute_task(name); ') ;
dbms_output.put_line('dbms_output.put_line('||'''#spool addm_' || r.instance_number || '_' ||
r.snap_id || '_' || (r.snap_id + 1) || '.txt'');');
dbms_output.put_line('dbms_output.put_line('||'''#select dbms_advisor.get_task_report('''''''||'||name||'''''','||'''''TEXT'''',''''TYPICAL'''') from dual ;'');');
dbms_output.put_line('dbms_output.put_line(''#spool off'');');
dbms_output.put_line('end ;
/');
end loop;
dbms_output.put_line('spool off');
end;
6、常见问题
6.1、AWR快照数据和ASH数据未正常产生，一般是由于Oracle mman和mmnl进程异常导致的，可以尝试下列方法解决