- To DISABLE Automatic SQL Tuning, use the DISABLE procedure as shown below BEGIN DBMSAUTOTASKADMIN.DISABLE( clientname = 'sql tuning advisor', operation = NULL, windowname = NULL); END; Go to the top of this article post to get the SQL to validate whether the Auto SQL Tuning job is enabled or not.
- Automatic SQL Tuning uses the AUTOTASK framework through a new task called “Automatic SQL Tuning” that runs every night by default. Here is a brief description of the automated SQL tuning process in Oracle Database 11g: Step 1: Based on the AWR Top SQL identification, Automatic SQL Tuning targets for automatic tuning.
- In many cases, it is easier and cheaper to disable auto tasks than to troubleshoot them (assumption – no one using auto tasks results). Just to remind you that all: 3 tasks are enabled by default independently whether you update your database to 11G or create a database from scratch.
- 0 Automated Database Maintenance Task (Auto task)& Automatic SQL Tuning (AST) automated database maintenance task also called auto task. DBMSAUTOTASKADMIN package is used to manage the tasks.
Issue-
In 11.2.0.3 database , we get alert in EM related to metric “Generic Operational Error” or 'Generic Operational Error Status '. Occasionally when running Automatic SQL Tuning the following messages may appear in the alert log:
Error-
These messages indicate that an auto kill of a 'hung'/long running tuning task has taken place.
This is a protective measure purely to avoid the task from over-running its time limit because of a single task and protects a the system from harm caused by such over-running.
Since this is an expected activity to prevent over-running there is no fix as such.
Instead as a workaround, you could:
FIX 1 :Give the task more time to complete (the following example would set the per statement timeout to 6 hours (21600 seconds)):
BEGIN
DBMS_SQLTUNE.set_tuning_task_parameter('SYS_AUTO_SQL_TUNING_TASK', 'LOCAL_TIME_LIMIT', 21600);
END;
/
Note
If you increase the per-statement time limit (LOCAL_TIME_LIMIT) then you need to stay within the bounds of the time limit for the entire task (TIME_LIMIT). The duration of the TIME_LIMIT parameter must be at least equal or greater than the LOCAL_TIME_LIMIT. When the maintenance window closes the SQL Tuning Advisor is stopped.
FIX 2 :
Disable the automatic tuning process and the messages will not appear anymore (though obviously the auto tuning will also no longer occur - you could manually execute the job as desired later).
To disable the job:
connect / as sysdba
BEGIN
DBMS_AUTO_TASK_ADMIN.DISABLE(
client_name => 'sql tuning advisor',
operation => NULL,
window_name => NULL);
END;
/
To re-enable in future:
connect / as sysdba
BEGIN
DBMS_AUTO_TASK_ADMIN.ENABLE(
client_name => 'sql tuning advisor',
operation => NULL,
window_name => NULL);
END;
/
Source :
How to Avoid or Prevent 'Process 0x%p appears to be hung in Auto SQL Tuning task' Messages (Doc ID 1344499.1)
In 11.2.0.3 database , we get alert in EM related to metric “Generic Operational Error” or 'Generic Operational Error Status '. Occasionally when running Automatic SQL Tuning the following messages may appear in the alert log:
Error-
These messages indicate that an auto kill of a 'hung'/long running tuning task has taken place.
This is a protective measure purely to avoid the task from over-running its time limit because of a single task and protects a the system from harm caused by such over-running.
Since this is an expected activity to prevent over-running there is no fix as such.
Instead as a workaround, you could:
FIX 1 :Give the task more time to complete (the following example would set the per statement timeout to 6 hours (21600 seconds)):
BEGIN
DBMS_SQLTUNE.set_tuning_task_parameter('SYS_AUTO_SQL_TUNING_TASK', 'LOCAL_TIME_LIMIT', 21600);
END;
/
Note
If you increase the per-statement time limit (LOCAL_TIME_LIMIT) then you need to stay within the bounds of the time limit for the entire task (TIME_LIMIT). The duration of the TIME_LIMIT parameter must be at least equal or greater than the LOCAL_TIME_LIMIT. When the maintenance window closes the SQL Tuning Advisor is stopped.
FIX 2 :
Disable the automatic tuning process and the messages will not appear anymore (though obviously the auto tuning will also no longer occur - you could manually execute the job as desired later).
To disable the job:
connect / as sysdba
BEGIN
DBMS_AUTO_TASK_ADMIN.DISABLE(
client_name => 'sql tuning advisor',
operation => NULL,
window_name => NULL);
END;
/
To re-enable in future:
connect / as sysdba
BEGIN
DBMS_AUTO_TASK_ADMIN.ENABLE(
client_name => 'sql tuning advisor',
operation => NULL,
window_name => NULL);
END;
/
Source :
How to Avoid or Prevent 'Process 0x%p appears to be hung in Auto SQL Tuning task' Messages (Doc ID 1344499.1)
Oracle Disable Sys_auto_sql_tuning_task
Auto Sql Tuning Task
17.1 Automatic Tuning Optimizer. Auto tune apps. Where to get vocal mixing vst cracked reddit free. Vocal vst software download. When SQL statements are executed by the Oracle database, the query optimizer is used to generate the execution plans of the SQL statements. The query optimizer operates in two modes: a normal mode and a tuning mode. In normal mode, the optimizer compiles the SQL and generates an execution plan.