Automated database maintenance tasks is used by oracle to auto tune the SQL Queries, stale stats gather and space advisory. Some time this jobs change the execution plan and caused performance issue.
Sep 26, 2007 Oracle Database 11g: Automatic SQL Tuning - Page 3. By Jim Czuprynski. Procedure DBMSAUTOTASKADMIN.ENABLE permits the DBA to enable or disable SYSAUTOSQLTUNINGTASK, the task that controls the execution of AST. Just as if it had been run in background during its normally scheduled execution time. Jan 22, 2015 ORA-13605: The specified task or object SYSAUTOSQLTUNINGTASK does not exist for the current user. January 22, 2015 by anargodjaev in Oracle İntroduction. Automatic SQL Tuning in Oracle 11g - Automatic SQL Tuning in Oracle 11g courses with reference manuals and examples pdf. Oracle Scheduler New Features. (sys auto sql tuning task), runs automatically every night, as part of the automatic maintenance task framework, looking for ways to speed up the perfor mance of high-load SQL.
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End automatic SQL Tuning Advisor run for special tuning task 'SYSAUTOSQLTUNINGTASK' Changes The database was in this case moved to a different system, i.e. Sep 03, 2015 Disable and Enable Auto task Job for 11g and 12c version in Oracle. Automated database maintenance tasks is used by oracle to auto tune the SQL Queries, stale stats gather and space advisory. Some time this jobs change the execution plan and caused performance issue. SELECT parametername, parametervalue FROM dbaadvisorparameters WHERE taskname = 'SYSAUTOSQLTUNINGTASK'; SELECT parametername, parametervalue FROM dbaadvisorparameters. Oracle Scheduler Does Not Execute Any Jobs After Applying Windows Database Bundle Patch: 1.
Following jobs is configured default by Oracle:
Automatic Optimizer Statistics Collection- Gathers stale or missing statistics
Automatic Segment Advisor – Identifies segments that reorganized to save space
Automatic SQL Tuning Advisor – Tune high load SQL
Disable all three jobs, you can used following command:
For Disable:
EXEC DBMS_AUTO_TASK_ADMIN.disable;
For Enable:
EXEC DBMS_AUTO_TASK_ADMIN.enable;
Disable one by one follow following commands:
1. Check the enabled job present in oracle database
SQL> SELECT client_name, status FROM dba_autotask_client;
2. Disable the following jobs
SQL> EXEC DBMS_AUTO_TASK_ADMIN.DISABLE(client_name=>'sql tuning advisor', operation=>NULL, window_name=>NULL);
SQL> EXEC DBMS_AUTO_TASK_ADMIN.DISABLE(client_name=>'auto space advisor', operation=>NULL, window_name=>NULL);
SQL> EXEC DBMS_AUTO_TASK_ADMIN.DISABLE(client_name=>'auto optimizer stats collection', operation=>NULL, window_name=>NULL);
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PL/SQL procedure successfully completed.
3. Check the status again for auto task jobs
SQL> SELECT client_name, status FROM dba_autotask_client;
4. Enable the auto task jobs:
SQL> EXEC DBMS_AUTO_TASK_ADMIN.ENABLE(client_name=>'sql tuning advisor', operation=>NULL, window_name=>NULL);
SQL> EXEC DBMS_AUTO_TASK_ADMIN.ENABLE(client_name=>'auto space advisor', operation=>NULL, window_name=>NULL);
SQL> EXEC DBMS_AUTO_TASK_ADMIN.ENABLE(client_name=>'auto optimizer stats collection', operation=>NULL, window_name=>NULL);
PL/SQL procedure successfully completed.