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 performance is improved if

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 more SQL statements as the input content, an

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 is only suitable for people who don't understa

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

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

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, only for the people who do not understand the

automatically identifies problematic SQL statements and implement s tuning recommendations during system maintenance windows as an automated maintenance task. There are two modes of the query optimizer: Normal mode and modulation mode. Optimizer in normal mode, when SQL is executed, the query optimizer generates an execution plan for

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 statement and generate an execution plan. There

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| | 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