oracle sql tuning advisor

In the case of performance problems with Oracle databases, it is less effort to use Oracle's own toolkit to give reasonable tuning recommendations.Tuning Advisor is optimized for the execution plan of the input SQL setThe Accsee Advisor is a recommendation on how much perfor

When Oracle database performance problems occur, it is effort-saving to use the Oracle toolkit and give reasonable optimization suggestions. The following two packages are described and their specific practices. The smallest adjustment tool for SQL Tuning Advisor. Use one or

How to use Oracle's Dbms_sqltune package to execute SQL Tuning Advisor for SQL self-tuning1 ". Here is a simple example to illustrate the use of Dbms_sqltuneStart by running a SQL that you want to tune, and then get the SqlidSql> SELECT * from V$sqltext where sql_text like '

How to use Oracle's Dbms_sqltune package to execute SQL Tuning Advisor for SQL self-tuning1 ". Here is a simple example to illustrate the use of Dbms_sqltuneStart by running a SQL that you want to tune, and then get the SqlidSql> SELECT * from V$sqltext where sql_text like '

Tags: style c tar ext a intHow to use Oracle's Dbms_sqltune package to run SQL Tuning Advisor for SQL automatic tuning1 ". Here's a simple example of how dbms_sqltune is used.First execute the next SQL that you want to tune, and then get the SqlidSql> SELECT * from V$sqltext

) | Time |----------------------------------------------------------------------------------------------------| 0 | SELECT STATEMENT | | 1 | 96 | 2 (0) | 00:03:18 || 1 | TABLE ACCESS by INDEX rowid| Test_sql_advisor | 1 | 96 | 2 (0) | 00:03:18 ||* 2 | INDEX RANGE SCAN | Test_sql_advisor_idx | 1 | | 1 (0) | 00:01:39 |---------------------------------------------------------------------------------------------------- predicate information (identified by Operation ID):------------------------------

: = Time_limit_default,Ask_name in VARCHAR2: = NULL,Description in VARCHAR2: = NULL)RETURN VARCHAR2; Case:DECLAREMy_task_name VARCHAR2 (30);My_sqltext CLOB;BEGINMy_sqltext: = ' SELECT 1 from dual ';My_task_name: = Dbms_sqltune. Create_tuning_task (Sql_text = My_sqltext,Bind_list=>sql_binds (ANYDATA. Convertnumber (9)),user_name = ' Noap ',Scope=> ' comprehensive ',Time_limit = 600,Task_name = ' Sql_tuning_test ',Description=> ' TUNING TASK ');END; BEG

Before oracle10g, it would be a hassle to optimize an SQL statement, but the SQL Tuning Advisor tool, introduced in oracle10g this release, would significantly reduce the workload of SQL tuning, but to use

Tags: autotask sql_tuningProduction on a set of 11g database Alert.log error ora-16957:sql Analyze time limit interrupt.Querying MOS-related documents troubleshooting:ora-16957: "SQL Analyze time limit Interrupt" Errors (document ID 1275248.1)The ORA-16957 error is a internal error code used to indicate that SQL Tuning

VARCHAR2;Here's an example:1. Create an STA (SQL Tuning Advisor) analysis task for sql_id (executed with SYS user)sql> variable task_li_test varchar2 (2000);Sql>exec:task_li_test:=dbms_sqltune.create_tuning_task (sql_id=> ' xxxxxxxxxxx ', time_limit=>600,task_ Name=> ' Li_s

in 10g, Oracle launched its own SQL optimization aids : SQL Optimizer (SQL Tuning Advisor :STA) , it is the new Dbms_sqltune package. Use the STA to make sure that the optimizer is in CBO mode. but I think that using this tool i

database to consider whether the tuning method is feasible, this must be the DBA grasp; It is also necessary for DBAs to understand why it is so tuned that they are better able to give specific tuning options based on the actual situation, or else the high-quality work will become cheap. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ This article John

in 10g, Oracle launched its own SQL optimization aids : SQL Optimizer (SQL Tuning Advisor :STA) , it is the new Dbms_sqltune package. Use the STA to make sure that the optimizer is in CBO mode. but I think the use of such tools,

Tags: ATI latest sel Opening technical file reference tis onlineNow has been doing the project, the amount of data is relatively small, at the beginning of the time did not feel, because it is just beginning, the amount of data is very small, in the process of the use of speed is very fast, but with the constant growth of data volume, found that the program is more and more slow, even the problem of timeouts, so to the program Early project is relatively tight, not for the Big Data volume busine

Oracle 10 Gb later optimizer supports two modes: Normal Mode and tuning mode. In most cases, the optimizer is in normal mode. The CBO-based Normal Mode only takes into account a small part of the Execution Plan set to select which execution plan, because it needs to be as short as possible, it is usually several seconds or milliseconds to parse the current SQL st

statement | 471 | 43803 | 979 (1) | 00:00:12 || 1 | table access by index rowid | T1 | 1 | 9 | 2 (0) | 00:00:01 || 2 | nested loops | 471 | 43803 | 979 (1) | 00:00:12 || * 3 | table access full | T1 | 471 | 39564 | 36 (0) | 00:00:01 || * 4 | index range scan | T1_IDX | 1 | 1 (0) | 00:00:01 |Bytes --------------------------------------------------------------------------------------Predicate Information (identified by operation id ):---------------------------------------------------3-filter ("A

| | 471 | 43803 | 979 (1) | 00:00:12 ||* 3 | TABLE ACCESS Full | T1 | 471 | 39564 | 36 (0) | 00:00:01 ||* 4 | INDEX RANGE SCAN | T1_idx | 1 | | 1 (0) | 00:00:01 |--------------------------------------------------------------------------------------predicate information (identified by Operation ID):---------------------------------------------------3-filter ("A". ") object_name "like '%t1% ')4-access ("A". ") object_id "=" B "." OBJECT_ID ")Note------SQL