oracle 11g dbms_workload_repository手工管理AWR快照，基线
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1、修改快照设置[sql] view plain copysys@ORCL> select * from dba_hist_wr_control; DBID SNAP_INTERVAL RETENTION TOPNSQL ---------- ------------------------- ------------------------------ ---------- 1301772781 +00000 01:00:00.0 +00008 00:00:00.0 DEFAULT sys@ORCL> exec dbms_workload_repository.modify_snapshot_settings(retention => 15*1440,interval => 30); PL/SQL 过程已成功完成。 sys@ORCL> select * from dba_hist_wr_control; DBID SNAP_INTERVAL RETENTION TOPNSQL ---------- ------------------------- ------------------------------ ---------- 1301772781 +00000 00:30:00.0 +00015 00:00:00.0 DEFAULT interval：将间隔设置为0时，oracle将禁止采用自动和手工快照的机制。retention：当保存时间设置为0时，oracle将永久地保存这个快照。 2、创建和删除快照[sql] view plain copysys@ORCL> exec dbms_workload_repository.create_snapshot(); PL/SQL 过程已成功完成。 sys@ORCL> exec dbms_workload_repository.drop_snapshot_range(low_snap_id => 10,high_snap_id => 12); PL/SQL 过程已成功完成。 sys@ORCL> exec dbms_workload_repository.drop_snapshot_range(low_snap_id => 628,high_snap_id => 629); PL/SQL 过程已成功完成。 dba_hist_snapshot视图将列出有关可用快照的信息。 3、创建和删除基线[sql] view plain copysys@ORCL> exec dbms_workload_repository.create_baseline(start_snap_id => 630,end_snap_id => 635,baseline_name => 'base line'); PL/SQL 过程已成功完成。 sys@ORCL> select baseline_name,start_snap_id,end_snap_id from dba_hist_baseline; BASELINE_NAME START_SNAP_ID END_SNAP_ID ---------------------------------------------------------------- ------------- ----------- base line 630 635 SYSTEM_MOVING_WINDOW 636 637 sys@ORCL> exec dbms_workload_repository.drop_baseline(baseline_name => 'base line',cascade => true); PL/SQL 过程已成功完成。 sys@ORCL> select baseline_name,end_snap_id from dba_hist_baseline; BASELINE_NAME START_SNAP_ID END_SNAP_ID ---------------------------------------------------------------- ------------- ----------- SYSTEM_MOVING_WINDOW 636 637 sys@ORCL> exec dbms_workload_repository.create_baseline(to_date('2013-11-03 00:00:00','yyyy-mm-dd hh24:mi:ss'),to_date('2013-11-03 06:00:00','base line2'); PL/SQL 过程已成功完成。 sys@ORCL> select baseline_name,end_snap_id from dba_hist_baseline; BASELINE_NAME START_SNAP_ID END_SNAP_ID ---------------------------------------------------------------- ------------- ----------- base line 685 686 base line2 685 686 SYSTEM_MOVING_WINDOW 640 696 4、自动创建AWR基线[sql] view plain copysys@ORCL> alter session set NLS_DATE_FORMAT= 'yyyy-mm-dd hh24:mi:ss'; 会话已更改。 sys@ORCL> exec DBMS_WORKLOAD_REPOSITORY.create_baseline_template( day_of_week => 'WEDNESDAY', hour_in_day => 0, duration => 6, start_time => '2013-11-01:00:00:00', end_time => '2013-12-31:06:00:00', baseline_name_prefix => 'Batch Baseline ', template_name => 'Batch Template', expiration => 365); PL/SQL 过程已成功完成。 sys@ORCL> select t.template_name, t.template_type, t.start_time, t.end_time, t.day_of_week, t.hour_in_day, t.duration from dba_hist_baseline_template t; TEMPLATE_NAME TEMPLATE_ START_TIME END_TIME DAY_OF_WE HOUR_IN_DAY DURATION ------------------------------ --------- ------------------- ------------------- --------- ----------- ---------- Batch Template REPEATING 2013-11-01 00:00:00 2013-12-31 06:00:00 WEDNESDAY 0 6 sys@ORCL> exec DBMS_WORKLOAD_REPOSITORY.drop_baseline_template('Batch Template'); PL/SQL 过程已成功完成。 day_of_week：天或者星期，基线在这个时间上重复。Specify one of the following values:('SUNDAY','MONDAY','TUESDAY','WEDNESDAY','THURSDAY','FRIDAY','SATURDAY','ALL')hour_in_day：0-23，执行基线在这个小时开始。duration：持续时间(小时数)。start_time：创建基线的开始时间。end_time：创建基线的结束时间。expiration :基线过期的天数。 对于上面这个模板，将会在每周三根据0:00到上午6：00的时间窗口创建固定基线。 （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |