advanced oracle sql tuning

in a plan baseline. If Plan_name is also specified, the corresponding execution plan is displayed.Note: In order to preserve backward compatibility, the statement will be compiled with this storage outline if the stored outline pair of an SQL statement for a user session is active. In addition, even if automatic scheduled capture is enabled for the session, the optimizer is not stored in SMB with a plan that is generated by the storage outline.Althou

, Configuration Tnsnames.ora Save the new Tnsnames.ora file in Notepad under this path: C:\instantclient_11_2_x86\NETWORK\ADMIN\tnsnames.ora The content reference is configured below: My_xxxserver =(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP) (HOST = 10.199.200.102) (PORT = 1521))(Connect_data =(SID = ORAVM)(SERVER = dedicated))) 4, extract PL/SQL to the target machine, such as: C:\Program Files (x86) \plsql Developer 9.0.0.1601\ 5, open PL/

Author: Jiangnan BaiyiFrom 8 I to 10g, Oracle constantly evolved its own SQL tuning intelligence, and some secret-level optimization tips have expired.However, I like to be ineffective. I don't have to worry about it. I love to stick to toad for Oracle Xpert, and I love to do things based on the general direction of co

Label:This document is based on the relevant data collated, summarized, mainly on the Oracle database, to obtain the most authoritative and correct method of SQL statement execution plan, and also explained in detail the meaning of the options available in each method and how to use, so as to facilitate everyone and their daily work to consult the use of Because I did not find this blog support attachment u

parsing function anatomy 8.4 Function List 8.5 aggregate functions 8.5.1 aggregate functions that span the entire partition 8.5.2 Fine-grained window declarations 8 .5.3 Default window declares 8.6 lead and Lag 8.6.1 syntax and sort 8.6.2 Example 1: Returns a value from the previous row 8.6.3 Understanding the displacement of the data row 8.6.4 Example 2: Returns a value from the next row 8.7 fi　Rst_value and Last_value 8.7.1 Example: Use First_value to calculate the maximum value

following question due to permission issues: http://www.cnblogs.com/jeet/archive/2005/06/24/115150.html:1. Log on as an administrator;2. Find the ORACLE_HOME folder (for example, C: \ oracle \ ora92), right-click it, select attribute-security, and select "Authenticated Users" in the group or user bar ", in the following permission list, remove the "read and run" permission, and then press the application. Re-select the "read and run" permission and c

://www.cnblogs.com/jeet/archive/2005/06/24/115150.html:1. Log on as an administrator;2. Find the ORACLE_HOME folder (such as C:/Oracle/ora92), right-click it, select attribute-security, and select "Authenticated Users" in the group or user bar ", in the following permission list, remove the "read and run" permission, and then press the application. Re-select the "read and run" permission and click the application; select the "

, activation_level, session_settable2 from V $ statistics_level3 where statistics_name = 'SQL monitoring ';Statistics_name session_status system_status activation_level session_s----------------------------------------------------------------------------SQL monitoring enabled typical Yes At the same time, the control_management_pack_access parameter must be diagnostic +

Document directory 2. 1. Export data from the table to a file (using trusted connections) 2. export data from the table to a file (using Hybrid Authentication) 2. 3. Import the data in the file to the table 0. References: SQL Server BCP usage Summary BCP Utility How to import data from 6 million users to MySQL, MSSQL, and Oracle databases in a community Select into and insert into select table copy sta

oracle| data Advanced Data Migration A lot of time, to the heterogeneous database data migration or extraction, if the Oracle data extraction in SQL, through ODBC, OLE DB and other means, to extract data from the Oracle SQL, most

SQL Tuning Set (STS) is an integral part of Oracle's 10 Gb SQL Tuning Advisor feature. Each adjustment tool set contains one or more SQL statements and the context information required to correctly interpret them. SQL

Tns_admin and the value is the path to the Tnsnames.ora file, for example: E:\oracleclient\instantclient_11_24.After installing Plsql, start, Cancel, and click Tools->preferences->connection:Oracle home=e:\oracleclient\instantclient_11_2OCI Library=e:\oracleclient\instantclient_11_2\oci.dllRestart Plsql, enter the user name, password, select the PL/SQL instance name to enter the database5.The initial login may have the problem of Chinese garbled, the

Tags: resource statement second Ora online table also requires a script mergeThis is the ultimate problem, because the complexity of optimization itself is difficult to summarize, many times the method of optimization is not the use of the mysterious technology, but only a level of ideological differences, and these are likely to lead to significant performance differences.So sometimes we need to figure out what the demand is and whether SQL itself is

SAA-SQL access advisor (oracle 11.2 and later), saa-sqladvisor I recently used SAA and found that many blogs on the Internet actually have problems using it in subsequent versions after oracle 11.2, Either the version change syntax is changed or incomplete. Take some time to list the use of the new version. **************************************** *1. Introducti

data is returned as soon as possible)2. Execution method prompt:USE_NL (use nested loops to join)USE_MERGE (Union using merge join)USE_HASH (Union using hash join)3. Index prompt:INDEX (table index) (use the prompted table index for query)4. Other advanced prompts (such as parallel processing)The prompt function of ORACLE is a strong function and a complicated application, and the prompt is just a suggesti

dictionary, which means more time is spent(4)Reduce access to the database: Oracle has done a lot of work internally: Parsing SQL statements, estimating index utilization, binding variables, reading data blocks, and more;(5)The ArraySize parameter is reset in Sql*plus, Sql*forms, and pro*c to increase the amount of da

. Target-related tips:Cost (optimized by costs)Rule (optimized by rules)CHOOSE (default) (Oracle automatically selects cost or rules for optimization)All_rows (all rows are returned as soon as possible)First_rows (first row of data returned as soon as possible)2. Tips for executing the method:USE_NL (union with Nested Loops method)Use_merge (Federated using the MERGE join method)Use_hash (union with HASH join)3. Index hints:Index (table index) (query

Tags: other statistic start buffer sum hint Tun str nesA new dynamic performance view, V$sql_monitor, is introduced in 11g to display SQL statement information for Oracle monitoring. SQL monitoring automatically starts for SQL statements that execute concurrently or consume more than 5 seconds of CPU time or I/O time,

The Oracle tutorial being looked at is: Oracle SQL Performance Tuning series learning one. 1. Choose the appropriate Oracle OptimizerThere are 3 Oracle optimizer types:A. Rule (rule-based) b. Cost (based on costs) c. CHOOSE (optio

Recently, using SAA, I found that many blogs on the internet are actually using more or less problems in later versions of Oracle 11.2.Either version changes the syntax changes or not enough, take a moment to list the new version of the use.*****************************************1. Introduction to use*****************************************Steps:Create a task and define the parameters;Define the load;Generate some suggestions;View and apply recomme