[AWR] ORA-13541修改AWR保留策略



修改awr保存时间和频率报错

[oracle@node3 ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Tue Feb 2 22:00:20 2016
Copyright (c) 1982, 2013, Oracle. All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> begin
dbms_workload_repository.modify_snapshot_settings (
interval => 30, --30分钟收集一次
retention => 7*24*60 --保存时间为7天
);end;
8 /
begin
*
ERROR at line 1:
ORA-13541: system moving window baseline size (691200) greater than retention
(604800)
ORA-06512: at "SYS.DBMS_WORKLOAD_REPOSITORY", line 174
ORA-06512: at "SYS.DBMS_WORKLOAD_REPOSITORY", line 222
ORA-06512: at line 3

报错了！！！

1.查看错误信息

[oracle@node3 ~]$ oerr ora 13541
13541, 00000, "system moving window baseline size (%s) greater than retention (%s)"
// *Cause: The system moving window baseline size must be less than the
// retention setting. The specified window size or retention
// violate this.
// *Action: Check the moving window baseline size or retention.

2.查看当前基线大小

SQL> SELECT dbid,baseline_name, baseline_type, moving_window_size from dba_hist_baseline;

DBID BASELINE_NAME BASELINE_TYPE
MOVING_WINDOW_SIZE
---------- ---------------------------------------------------- -----------
2029768178 SYSTEM_MOVING_WINDOW MOVING_WINDOW8

计算出现错误时两个数字（如下所示，2是打算修改的数值）

SQL> select 691200/60/60/24 from dual;

691200/60/60/24
---------------
8

SQL> select 604800/60/60/24 from dual; --要修改的值

604800/60/60/24
---------------
7
基数值必须小于或等于AWR快照所设置的保留值，所以需先设置AWR保留时长。

3.调整基线大小

SQL> exec dbms_workload_repository.modify_baseline_window_size(7);
PL/SQL procedure successfully completed.

4.再次执行一下语句

SQL> begin
dbms_workload_repository.modify_snapshot_settings (
interval => 30,
retention => 10080
);
end;
/
PL/SQL procedure successfully completed.

5.查看快照保存时间

SQL> select * from dba_hist_wr_control;

DBID SNAP_INTERVAL RETENTION TOPNSQL
---------- ------------------- ------------------- ----------
2029768178 +00000 00:30:00.0 +00007 00:00:00.0 DEFAULT

可以看到30分钟收集一次，保存时间为7天。