今天是2022年1月7日今天值夜班，同事让给优化一个sql，优化完成后，顺便看了下新系统的统计信息情况，发现在晚上做数据采集的时间，系统资源增加，发现是统计信息在跑，在模拟环境测试，特此记录。
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- trc get trace path - undo show undo info - user | users list all users info - version show database version - xo <sql_id> [phv] xplan.display_awr for given sql_id ( add execution order column ) - xpo <sql_id> [child_number] xplan.display_cursor for given sql_id( add execution order column ) - xp <sql_id> display_cursor for given sql_id - x <sql_id> display_awr for given sql_id
NOTE ================ - Set environment variable DBUSER to change default connect string which is "/ as sysdba" - Set environment variable ORA_TMP to the default temp directory ( default if /tmp when not set )
[oracle@rhys ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Fri Jan 7 01:25:45 2022
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
SYS@rhys> col REPEAT_INTERVAL for a60 SYS@rhys> set linesize 200 SYS@rhys> select t1.window_name,t1.repeat_interval,t1.duration from dba_scheduler_windows t1,dba_scheduler_wingroup_members t2 2 where t1.window_name=t2.window_name and t2.window_group_name= 'MAINTENANCE_WINDOW_GROUP' ;
WINDOW_NAME REPEAT_INTERVAL DURATION ------------------------------ ------------------------------------------------------------ --------------------------------------------------------------------------- FRIDAY_WINDOW freq=daily;byday=FRI;byhour=22;byminute=0; bysecond=0 +000 04:00:00 MONDAY_WINDOW freq=daily;byday=MON;byhour=22;byminute=0; bysecond=0 +000 04:00:00 SATURDAY_WINDOW freq=daily;byday=SAT;byhour=6;byminute=0; bysecond=0 +000 2 SUNDAY_WINDOW freq=daily;byday=SUN;byhour=6;byminute=0; bysecond=0 +000 2 THURSDAY_WINDOW freq=daily;byday=THU;byhour=22;byminute=0; bysecond=0 +000 04:00:00 TUESDAY_WINDOW freq=daily;byday=TUE;byhour=22;byminute=0; bysecond=0 +000 04:00:00 WEDNESDAY_WINDOW freq=daily;byday=WED;byhour=22;byminute=0; bysecond=0 +000 04:00:00
7 rows selected.
SYS@rhys> |
查看状态：
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SYS@rhys> select client_name,status from dba_autotask_client;
CLIENT_NAME STATUS ---------------------------------------------------------------- -------- auto optimizer stats collection ENABLED auto space advisor ENABLED sql tuning advisor ENABLED
SYS@rhys> |
更改执行时间：
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SYS@rhys> begin 2 dbms_scheduler.disable( name => 'SUNDAY_WINDOW' , force => TRUE); 3 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."SUNDAY_WINDOW"' ,attribute=> 'REPEAT_INTERVAL' ,value=> 'freq=daily;byday=SUN;byhour=1;byminute=0; bysecond=0' ); 4 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."SUNDAY_WINDOW"' ,attribute=> 'DURATION' ,value=>numtodsinterval(240, 'minute' )); 5 dbms_scheduler. enable ( name => 'SUNDAY_WINDOW' ); 6 dbms_scheduler.disable( name => 'SATURDAY_WINDOW' , force => TRUE); 7 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."SATURDAY_WINDOW"' ,attribute=> 'REPEAT_INTERVAL' ,value=> 'freq=daily;byday=SAT;byhour=1;byminute=0; bysecond=0' ); 8 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."SATURDAY_WINDOW"' ,attribute=> 'DURATION' ,value=>numtodsinterval(240, 'minute' )); 9 dbms_scheduler. enable ( name => 'SATURDAY_WINDOW' ); 10 dbms_scheduler.disable( name => 'FRIDAY_WINDOW' , force => TRUE); 11 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."FRIDAY_WINDOW"' ,attribute=> 'REPEAT_INTERVAL' ,value=> 'freq=daily;byday=FRI;byhour=1;byminute=0; bysecond=0' ); 12 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."FRIDAY_WINDOW"' ,attribute=> 'DURATION' ,value=>numtodsinterval(240, 'minute' )); 13 dbms_scheduler. enable ( name => 'FRIDAY_WINDOW' ); 14 dbms_scheduler.disable( name => 'THURSDAY_WINDOW' , force => TRUE); 15 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."THURSDAY_WINDOW"' ,attribute=> 'REPEAT_INTERVAL' ,value=> 'freq=daily;byday=THU;byhour=1;byminute=0; bysecond=0' ); 16 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."TUESDAY_WINDOW"' ,attribute=> 'DURATION' ,value=>numtodsinterval(240, 'minute' )); 17 dbms_scheduler. enable ( name => 'THURSDAY_WINDOW' ); 18 dbms_scheduler.disable( name => 'WEDNESDAY_WINDOW' , force => TRUE); 19 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."WEDNESDAY_WINDOW"' ,attribute=> 'REPEAT_INTERVAL' ,value=> 'freq=daily;byday=WED;byhour=1;byminute=0; bysecond=0' ); 20 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."WEDNESDAY_WINDOW"' ,attribute=> 'DURATION' ,value=>numtodsinterval(240, 'minute' )); 21 dbms_scheduler. enable ( name => 'WEDNESDAY_WINDOW' ); 22 dbms_scheduler.disable( name => 'TUESDAY_WINDOW' , force => TRUE); 23 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."TUESDAY_WINDOW"' ,attribute=> 'REPEAT_INTERVAL' ,value=> 'freq=daily;byday=TUE;byhour=1;byminute=0; bysecond=0' ); 24 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."TUESDAY_WINDOW"' ,attribute=> 'DURATION' ,value=>numtodsinterval(240, 'minute' )); 25 dbms_scheduler. enable ( name => 'TUESDAY_WINDOW' ); 26 dbms_scheduler.disable( name => 'MONDAY_WINDOW' , force => TRUE); 27 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."MONDAY_WINDOW"' ,attribute=> 'REPEAT_INTERVAL' ,value=> 'freq=daily;byday=MON;byhour=1;byminute=0; bysecond=0' ); 28 DBMS_SCHEDULER.SET_ATTRIBUTE(name=> '"SYS"."MONDAY_WINDOW"' ,attribute=> 'DURATION' ,value=>numtodsinterval(240, 'minute' )); 29 dbms_scheduler. enable ( name => 'MONDAY_WINDOW' ); 30 end; 31 /
PL /SQL procedure successfully completed.
SYS@rhys> select t1.window_name,t1.repeat_interval,t1.duration from dba_scheduler_windows t1,dba_scheduler_wingroup_members t2 2 where t1.window_name=t2.window_name and t2.window_group_name= 'MAINTENANCE_WINDOW_GROUP' ;
WINDOW_NAME REPEAT_INTERVAL DURATION ------------------------------ ------------------------------------------------------------ --------------------------------------------------------------------------- FRIDAY_WINDOW freq=daily;byday=FRI;byhour=1;byminute=0; bysecond=0 +000 04:00:00 MONDAY_WINDOW freq=daily;byday=MON;byhour=1;byminute=0; bysecond=0 +000 04:00:00 SATURDAY_WINDOW freq=daily;byday=SAT;byhour=1;byminute=0; bysecond=0 +000 04:00:00 SUNDAY_WINDOW freq=daily;byday=SUN;byhour=1;byminute=0; bysecond=0 +000 04:00:00 THURSDAY_WINDOW freq=daily;byday=THU;byhour=1;byminute=0; bysecond=0 +000 04:00:00 TUESDAY_WINDOW freq=daily;byday=TUE;byhour=1;byminute=0; bysecond=0 +000 04:00:00 WEDNESDAY_WINDOW freq=daily;byday=WED;byhour=1;byminute=0; bysecond=0 +000 04:00:00
7 rows selected.
SYS@rhys> |
更改完成。注意：每个schedule任务需要disable和enable之后才生效。
附：以下脚本可把Oracle自动统计信息收集周一到周五的时间窗口从22点调整为2点。
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begin dbms_scheduler.disable( name => 'MONDAY_WINDOW' ); dbms_scheduler.set_attribute( name => 'MONDAY_WINDOW' , attribute => 'REPEAT_INTERVAL' , value => 'freq=daily;byday=MON;byhour=2;byminute=0; bysecond=0' ); dbms_scheduler.enable( name => 'MONDAY_WINDOW' ); end ; / begin dbms_scheduler.disable( name => 'TUESDAY_WINDOW' ); dbms_scheduler.set_attribute( name => 'TUESDAY_WINDOW' , attribute => 'REPEAT_INTERVAL' , value => 'freq=daily;byday=TUE;byhour=2;byminute=0; bysecond=0' ); dbms_scheduler.enable( name => 'TUESDAY_WINDOW' ); end ; / begin dbms_scheduler.disable( name => 'WEDNESDAY_WINDOW' ); dbms_scheduler.set_attribute( name => 'WEDNESDAY_WINDOW' , attribute => 'REPEAT_INTERVAL' , value => 'freq=daily;byday=WED;byhour=2;byminute=0; bysecond=0' ); dbms_scheduler.enable( name => 'WEDNESDAY_WINDOW' ); end ; / begin dbms_scheduler.disable( name => 'THURSDAY_WINDOW' ); dbms_scheduler.set_attribute( name => 'THURSDAY_WINDOW' , attribute => 'REPEAT_INTERVAL' , value => 'freq=daily;byday=THU;byhour=2;byminute=0; bysecond=0' ); dbms_scheduler.enable( name => 'THURSDAY_WINDOW' ); end ; / begin dbms_scheduler.disable( name => 'FRIDAY_WINDOW' ); dbms_scheduler.set_attribute( name => 'FRIDAY_WINDOW' , attribute => 'REPEAT_INTERVAL' , value => 'freq=daily;byday=FRI;byhour=2;byminute=0; bysecond=0' ); dbms_scheduler.enable( name => 'FRIDAY_WINDOW' ); end ; / |
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原文链接：https://blog.csdn.net/rhys_oracle/article/details/122356341
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