Oracle 11g 禁用 SQL Tuning Advisor

生产上有一套11g数据库alert.log报错ORA-16957: SQL Analyze time limit interrupt。
查询MOS相关文档Troubleshooting: ORA-16957: "SQL Analyze time limit interrupt" Errors （文档 ID 1275248.1）
The ORA-16957 error is an internal error code used to indicate that SQL Tuning Task has reached the time limit for tuning a specific sql. The default time limit is 3600 seconds.
1. Check the current timing:
1234567 COLUMN parameter_value FORMAT A30
SELECT parameter_name, parameter_value
FROM dba_advisor_parameters
WHERE task_name = "SYS_AUTO_SQL_TUNING_TASK"
AND parameter_name IN （"TIME_LIMIT",
"DEFAULT_EXECUTION_TYPE",
"LOCAL_TIME_LIMIT"）;
Then, increase the time:Using:BEGIN
DBMS_SQLTUNE.SET_TUNING_TASK_PARAMETER（task_name => "SYS_AUTO_SQL_TUNING_TASK", parameter => "TIME_LIMIT", value => 7200）;
END;
/ 意思是后台自动分析sql耗时超过了默认的时间限制3600s，需要使用DBMS_SQLTUNE.SET_TUNING_TASK_PARAMETER包增长时间限制。
一般在生产上不默认是不开启SQL TUNING ADVISOR。可以使用下面代码关闭自动SQL TUNING ADVISOR。
--查询当前任务状态
SYS@db2> select client_name,status from DBA_AUTOTASK_CLIENT;

CLIENT_NAME STATUS
---------------------------------------------------------------- --------
auto optimizer stats collection ENABLED
auto space advisor ENABLED
sql tuning advisor ENABLED
--禁用sql tuning advisor
SYS@db2> BEGIN
2 dbms_auto_task_admin.disable（
3 client_name => "sql tuning advisor",
4 operation => NULL,
5 window_name => NULL）;
6 END;
7 /

PL/SQL procedure successfully completed.
--再次查询状态
SYS@db2> select client_name,status from DBA_AUTOTASK_CLIENT;

CLIENT_NAME STATUS
---------------------------------------------------------------- --------
auto optimizer stats collection ENABLED
auto space advisor ENABLED
sql tuning advisor DISABLED
--启用sql tuning advisor
BEGIN
dbms_auto_task_admin.enable（
client_name => "sql tuning advisor",
operation => NULL,
window_name => NULL）;
END;更多Oracle相关信息见Oracle 专题页面 http://www.linuxidc.com/topicnews.aspx？tid=12本文永久更新链接地址