Jan 28, 2016 Developers and DBAs get help from Oracle experts on: SYSAUTOSQLTUNINGTASK-Is it possible if we want to gather table stats via 'SYSAUTOSQLTUNINGTASK' except. Little snitch 4.0.6 license key. HUNG IN AUTO SQL TUNING TASK Scenario. The explanation is that the AUTO SQL TUNING TASK has been over-running and as a protective measure it is auto killed. As thus, there is no fix for this and the solution is to disable this job and eventually manually execute it when. To check scheduled concurrent request in R12 SELECT cr.requestid.
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.
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;
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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;
Sys_auto_sql_tuning_task Schedule 2018
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);
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);
Sys_auto_sql_tuning_task Schedule Template
SQL> EXEC DBMS_AUTO_TASK_ADMIN.ENABLE(client_name=>'auto optimizer stats collection', operation=>NULL, window_name=>NULL);
PL/SQL procedure successfully completed.