oracle sql tuning advisor

[Oracle] oracledba6 SQL Tuning sets, oracledba6tuning You want to use the SQL Tuning Advisor to generate recommendation S for badly written SQL statements in your development environm

Label:You want to use the SQL Tuning Advisor to generate recommendations for badly written SQL statements in your development environment. WHich Three sources can you select for the advisor to analyze? (ChooseThree.)A. Top SQLB. SnapshotsC.

Tags: implementation mechanism originally page organizes tables based on free article content index ClustFollowing the book on SQL tuning (SQL tuning or SQL optimization) in the essentials of high-performance SQL

The SQL Tuning toolset (SQL Tuning set,sts) is an integral part of the Oracle 10g SQL Tuning Advisor feature. Each

valuable, while the Oracle lock mechanism is more advantageous, allowing Oracle applications to be more comfortable with DML operations, but this does not mean that you can do whatever you do, and in reality, even a lot of senior developers, are not very understanding of the characteristics and application of Oracle transactions, so often unnecessary use of manu

I. Description Starting from Oracle 10 Gb, oracle introduced Segment Advisor to check whether there are bucket-related recommendations in the database, and starting from 10gR2, oracle automatically schedules and runs a segment advisor job, regularly analyzes the segments in

Label:11g new Features-automatic SQL tuning (Automatic SQL Tuning) In Oracle 10g, an automatic SQL Tuning feature was introduced. In addition, ADDM monitors

11g new Features-automatic SQL tuning (Automatic SQL Tuning)In Oracle 10g, an automatic SQL Tuning feature was introduced. In addition, ADDM monitors

SQL execution is slow, how fast and accurate optimization. SQLHC is one of the best tools. By getting all the SQL execution plans, list the actual performance bottlenecks, listing the number of rows on the table where SQL resides, the data and distribution of each column, the existing index, the actual execution of

to go. In the development, we have to do some optimization of business logic, to avoid complex logic operations, especially to avoid a very large number of cycles of business logic processing, on the one hand we want to simplify business logic, some business logic to the program to deal with, on the other hand we can use SQL very clever to achieve a lot of logic complex requirements, Avoid having to do a lot of complex logic processing, rather than

August 14, 2017, a city of Oracle related Scheduler ETL extraction speed is very slow, the average SQL statement execution time of about 9 seconds, if shown:650) this.width=650; "Src=" http://img.blog.csdn.net/20170814133720856?watermark/2/text/ ahr0cdovl2jsb2cuy3nkbi5uzxqvd3d3x3h1zv94aq==/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/dissolve/70/gravity/ Center "width=" "style=" border:0px;vertical-align:mi

In-Memory Advisor analyzes your workload and then provides suggestions on how to configure Oracle Database In-Memory Advisor.This advisor is part of the Database Tuning pack. Attachment imadvisor.zip (https://support.oracle.com/epmos/main/downloadattachmentprocessor? Parent = DOCUMENT sourceId = 1965343.1 attachid =

is much higher than that of the composite Index query efficiency, while in 11.2.0.3 version Verify that the ad hoc query efficiency of the common composite index is more efficient than the efficiency of the bitmap index) Create TableT (name_id, gender not NULL, location not NULL, Age_range not NULL, data) as Selectrownum, Decode ( Floor(Dbms_random.value (0,2)),0,'M',1,'F') gender, Ceil (Dbms_random.value (0, -) Location , decode ( Floor(Dbms_random.value (0,4)),0,' Child',1,' Young',2,'Middle

add data to the table (delete, update operations, and so on), add the address of the new record to the index, which slows down the new data. Presumably, to be able to read it, it's not exactly right. Knowing the index, we can add the appropriate index above the table to improve the performance of the query statement.You can look at an index as a unique table, SQL query, if the field is indexed field will be indexed to query, then the index of this un

1. New tuning Set Object ***************************************** ---Authorize grant administer any SQL TUNING SET to Scott;---Delete the existing stsbegin Dbms_sqltune. Drop_sqlset (sqlset_name = ' ocpyang_sts '); end;/---new Stsbegin dbms_sqltune. Create_sqlset (sqlset_name = ' ocpyang_sts ', Sqlset_owner = ' SCOTT ', description = ' ocpyangtest '); end;/---Vi

Tags: des style blog io using ar strong SP CTIAdvanced SQL Optimization (iii) Common optimization tools--12 Senior DBA teaches you Oracle development and optimization--Advanced SQL Optimization (i)--12 Senior DBA teaches you Oracle development and optimization-Performance optimization section1 autotraceSet Autotrace on

Label:A recent project involves data-table queries of large data volumes. The total data table is about 700 million-2 billion, the primary key to establish a global unique index, the partition policy is hash partition + range partition, most of the time the query condition hit record more than million, a single return to the previous XX record. The following experiences are summed up in the tuning process:(1) Minimize the interval limit, even if the a

Select * from Table (dbms_xplan.display_cursor (sql_id = ' 9s7pt2ay4t3jg '));DeclareL_result_name Varchar2 (30);L_task_name Varchar2 (£): = ' task_name_9s7pt2ay4t3jg_1 ';L_sqlid Varchar2 (£): = ' 9S7PT2AY4T3JG ';BeginL_result_name: = Dbms_sqltune.create_tuning_task (sql_id = L_sqlid,Scope = ' comprehensive ',Time_limit = 60,Task_name = L_task_name,Description = ' Task to tune a query on a specified table ');Dbms_sqltune.set_tuning_task_parameter (Task_name = L_task_name,Parameter = ' Time_limit

Oracle SQL Tuning Health Check ScriptWe focus on the performance of database system, the main task of database tuning is to optimize SQL. Good data architecture design, with application system middleware and writing a beautiful SQL