oracle dba performance tuning

First, diagnostic tools 1. Warning Log file Warning log files contain system information and error logs that contain important errors (such as: ORA-600) and block checksum error messages (ora-1578,ora-1498). Monitor database operations such as CREATE DATABASE, STARTUP, SHUTDOWN, ARCHIVE log, and RECOVER, and record Non-default initialization parameter values. When Log_checkpionts_to_alert is set to true, the warning log file also records the start and end times of checkpoints, incomplete checkpo

Oracle DBA manual-database diagnosis cases and performance optimization practices (planned by guobiao) Pricing: ￥59.80 Member price: ￥44.85 (off) Example of this book free trial: http://www.china-pub.com/196286 [Basic Information]Author: Editorial Board of Oracle DBA ManualP

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Label:The story of Ash and awr 1.1 About Ash As we all know, when a user performs an operation in an Oracle database, it is necessary to create the appropriate connection and session, where all current session information is saved in the dynamic performance view v$session, where the DBA can see what the user is actually doing, or the current wait event. This part

A lot of the time, do Oracle DBA us, when the application administrator to inform us that the application is now slow, the database is very slow, when we go to the database to do a few examples of select also found the same problem, sometimes we can not start, Because we believe that the various life rates of the database are recommendations for meeting Oracle do

Oracle Performance Tuning-Beyond OCP proficient Oracle Video tutorial Training 38Course IntroductionWind Brother Oracle Video tutorial , operating system optimization tuning, storage System optimization

, Oracle will rearrange the NON-ACCESS predicate order to reduce CPU costs, but in most cases it will not be aware of performance differences.) ） Overall-it ' s definitely a good thing. In practice, you may have a much stronger bias towards indexed access paths which the May impact performance. Anyway--it's certainly a good thing. In fact, you can find a stronge

Oracle Database 10g Performance Tuning tips and techniques is recommended. For Oracle performance test, diagnosis, analysis, and optimization, see! Chapter 2 Basic index principles (beginner developer and beginner dBA). For

This technical article is provided by the "International Oracle user group" (ioug). It is an organization composed of user groups. This organization provides high-quality information, training, networking, and support, to improve the level of Oracle Database experts and database developers. This article is excerpted from the foreseeable procedural performance

Lecture 01st: Chapter 01 -- Overview of Oracle9i Database Performance Tuning Lecture 02nd: Chapter 01 -- Overview of Oracle9i Database Performance Tuning Lecture 03rd: Chapter 02 -- Diagnostic and tuning tools Lecture 04th: Chapter 02 -- Diagnostic and

Label:Poptest is the only training institute for developing Test and development engineers in China, aiming at the ability of the trainees to be competent in automated testing, performance testing and testing tools development. If you are interested in the course, please consult qq:908821478, call 010-84505200. 1 Overview of Performance optimizationsThis chapter provides an introduction Toperformance

database performance bottleneck, then the solution is as follows:A.1 increase the write process while adjusting the db_block_lru_latches parameters.Example: Modify or add the following two parametersDb_writer_processes=4Db_block_lru_latches=8A, 2 asynchronous IO,IBM This is much simpler, and HP is a bit more troublesome to contact HP engineers.b, DB file sequential read, refers to the sequential read, that is, the full table scan, which is the part w

Oracle| Experience | performance A lot of the time, do Oracle DBA us, when the application administrator to inform us that the application is now slow, the database is very slow, when we go to the database to do a few examples of select also found the same problem, sometimes we can not start, Because we believe that th

Document directory Preliminary steps Using bind variables There are several relatively easy steps you can take to improve performance. From the user's perspective, one of the most frequently used interfaces with a database involves SQL statements, so getting a handle on them is a good place to start, in terms of being able to see an immediate improvement. -->Oracle

dbms_workload_repository. Create_snapshot;We can also use the Dbms_workload_repository package to complete the baseline, modification of the default settings and so on.ADDM (Automatic Database Diagnostic Monitor AWR)is a consultant system within Oracle that can automate some of the optimization recommendations for the most databases, give recommendations for SQL optimization, index creation, and statistics collection.ADDM report Generation:Sqlplus>@?

An outline that is roughly written in the optimization content of the physical design and logical design of the DB, mainly physical design, logical design introduction of the content is not much, the outline of the physical structure design and example optimization of organic combination of the logical structure design and application adjustment together ... Oracle Performance

Oracle performance, I will explain in detail in this respect3. Network conditions: Net*sql responsible for data on the network, a large number of SQL will slow down the network speed. For example, 10M network card and 100 of the network card has a very obvious impact on the net*sql, as well as switches, hubs and so on network equipment performance impact on the