oracle performance tuning tips

SQL _PLAN_BASELINE View: SELECT SQL_HANDLE, PLAN_NAME, ENABLED, ACCEPTED, FIXED FROM DBA_SQL_PLAN_BASELINES; SQL_HANDLE PLAN_NAME ENA ACC FIX------------------------------------------------------------------------SYS_SQL_209d10fabbedc741 SYS_SQL_PLAN_bbedc741a57b5fc2 YES NO NOSYS_SQL_209d10fabbedc741 SYS_SQL_PLAN_bbedc741f554c408 YES YES NO 6. SQL Management Base SQL Management Base (SMB) is part of the data dictionary that resident the SY

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Oracle Objective Over the past decade, Oracle has become one of the most professional databases in the world. For IT professionals, it is important to ensure that Oracle's powerful features are used to improve the productivity of their companies. One of the most effective ways to do this is through Oracle tuning. It h

MySQL is a powerful open source database. With more and more database-driven applications, people have been pushing MySQL to its limits. Here are 101 tips for adjusting and optimizing MySQL installation. Some of the tricks are specific to the installation environment, but these ideas are generic. I've divided them into several categories to help you learn more about MySQL's tuning and optimization skills.

Chapter 2 procedural performance tuning of PL/SQL applications I. Reasons for PL/SQL Performance problems When the execution efficiency of PL/SQL-based applications is low, it is usually caused by poor SQL statements and programming methods, poor understanding of PL/SQL basics or misuse of shared memory. Bad SQL statements in PL/SQL PL/SQL programming see

), or (or), and not (non). Not can be used to negate any logical operation symbol. The following is an example of a NOT clause: ... where not (status = ' VALID ') If you want to use not, you should precede the phrase with parentheses and precede the phrase with the NOT operator. The NOT operator is included in another logical operator, which is the not equal to ( . : Where status For this query, it can be rewritten to not use not: SELECT * FROM employee where salary Although the results of thes

should precede the phrase with parentheses and precede the phrase with the NOT operator. The NOT operator is included in another logical operator, which is the not equal to (... where status For this query, it can be rewritten to not use not:SELECT * FROM employee where salaryAlthough the results of these two queries are the same, the second query scenario is faster than the first query scenario. The second query allows Oracle to use indexes on salar

Although the WebLogic version has now been upgraded to 10.3 and is packaged as Oracle Funsion middleware 11g, the new data is relatively small, sharing a WebLogic Classic version 8.1 performance tuning article. --------------------------------------------------------------------------------------------------------------- ---- Any successful product in the market

Oracle Oracle Expert Tuning Secrets Objective 　　 Over the past decade, Oracle has become one of the most professional databases in the world. For IT professionals, it is important to ensure that Oracle's powerful features are used to improve the productivity of their companies. One of the most effective ways to d

The author of this book is a leader in Java performance and Java HotSpot virtual machines, helping you to use modern soft practices to improve your practical life by summarizing energy, avoiding common mistakes, and tips and tricks.Using G1 to overcome the limitations of parallel, serial, and CMS garbage collectors learn about the various stages of G1 GC collection, including the young generation and the ol

Tags: size arrangement SDN Technology share ext ODBC. NET Analysis tool downPostgreSQL Hardware Performance Tuning Translated from the article "PostgreSQL Hardware performance Tuning" PostgreSQL is an object-relational database developed by developers all over the world on the Internet. She is an open so

System Performance Tuning for CentOS servers Linux is an open-source operating system that supports various hardware platforms. Linux servers are world-renowned. The main difference between Linux and Windows is that, by default, a Linux server does not provide a GUI (graphical user interface) but a command line interface. The main purpose of the GUI is to efficiently process non-interactive processes. The r

dbms_spd.flush_sql_plan_directive;SET Linesize 200COLUMN dir_id FORMAT A20COLUMN owner FORMAT A10COLUMN object_name FORMAT A10COLUMN col_name FORMAT A10SELECT To_char (d.directive_id) dir_id, O.owner, O.object_name,O.subobject_name Col_name,o.object_type, D.type, D.state, D.reasonFrom Dba_sql_plan_directives d,dba_sql_plan_dir_objects oWHERE d.directive_id=o.directive_idand O.owner = ' TEST 'ORDER by 1,2,3,4,5;No rows selectedSql>2. Performance feedb