performance optimization

J2EE platform application performance of a system is the system users and developers are concerned, the paper should pay attention to from the server-side programming code to discuss several aspects of the impact on performance, and summarizes some s

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Oracle SQL Performance Optimization (1) Select the most efficient sequence table name (only in the rule-based optimizer effectively): ORACLE parser in accordance with the order processing from right to left in the FROM clause of the table name, FROM

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Summary of the general direction of topic NoSQL 1 Redis Redis Cache technology is undoubtedly now the favorite back-end, built-in data structures to support more closely with our micro-Bo; here will study the design principles Redis, Cache design of

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Recently looking at a web performance optimization to the records of about Talk about several concepts under 1 Throughput: is the use of a computer processing unit time to describe the concurrent request processing 2.1 user requests 1000 and 100 time

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jameswxx Original 1: Introduction Database optimization is a very wide range of things related to more, and each specific database, the specific optimization process is not the same, because a large part of the final to be optimized with the specific

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Recently to help a student to do database optimization, looked at the statistics, I feel very good. One. Purpose Database parameters to optimize the performance improvement gained only a database application system all add up to about 40% performance

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[I would like this record recently read blog] 2010 top ten blog posts CSDN I, a written code of Summary: This is a blog written in 2009, but we wish it was named "2010 Top Ten CSDN blog article," the first place. Because of this "slow type&

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Run-dry decision analysis platform (RBP) of the application package reportmis / WEB-INF / RBP under file reportConfig.xml is the main configuration file parameters. When RBP deployed to different operating systems, application servers, update the sem

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Abstract: In the data warehouse environment, due to large amount of data generated by the processing efficiency, this in-depth analysis of the ORACLE table Of the several connections, characteristics, scope, and how to use and optimized for a detaile

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Abstract: In the data warehouse environment, due to large amount of data generated by the processing efficiency, this in-depth analysis of the ORACLE table Of the several connections, characteristics, scope, and how to use and optimized for a detaile

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Suggestions Hibernate performance optimization for Oracle databases, Fetch Size is set to JDBC's Statement read data when removed from the database every time the number of records, generally set to 30,50,100. Oracle Database JDBC driver default Fetc

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(1) Select the most efficient sequence table name (only in the rule-based optimizer effectively): ORACLE parser in accordance with the order processing from right to left in the FROM clause of the table name, FROM clause written in the final table (b

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There are many online mysql performance optimization solutions, but, mysql sql server optimization, compared with more trouble and responsibility, the same set, in a different environment, due to memory, visits, frequency of reading and writing, data

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Determine which AIX ® tools can be used to monitor a given solution of the CPU (Central Processing Unit, CPU), and understand why some of the tools is better than other tools. This series Part 1 discusses the use of optimization methods and the impor

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This series of three articles in-depth study of memory optimization parameter optimization, focus on memory performance optimization challenges and a variety of best practices, and also describes the AIX? Version 5.3 some of the improvements. Althoug

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Affect the performance of Oracle include: (1) adjusting database structure design; (2) adjusting the application design; (3) Oracle SQL performance optimization; (4) adjusting the server memory allocation; (5) adjust the hard disk I / O; (6) to adjus

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I. Introduction of this document for OOP8 production environment, the specific optimization strategies need to be adjusted according to actual situation; This document will explain how the following aspects for RedHat Enterprise Linux performance tun

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Yii CDBHttpSession database performance optimization of real storage session report it 0 1 Click to follow1 follower Previous articles on Yii CHttpSession the source code to optimize performance analysis of a detailed analysis of the CHttpSession pro

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Original: http://www.perfgeeks.com/?p=501 Today only to find strace is a good thing ah strace the process used to track the execution of system calls and the received signal. In the Linux world, the process can not directly access hardware devices, w

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The story begins: You and your team through unremitting efforts, and finally make the site successful on-line, at the beginning, fewer registered users, site performance is good, but with the increase in registered users, access speeds began to slow,

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1, sub-library sub-table Obviously, a main table (the table is very important, for example, the user table) unlimited growth is bound to seriously affect performance, and sub-sub-library table is a very good solution, that is, performance optimizatio

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ORACLE_SQL Performance Optimization Series

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db2 performance optimization of the buffer pool Requirements: Because the beginning of the project did not conduct in-depth familiarity with the DB2 database, so do the performance testing caused the project when the late, leading to application acce

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In JDBC applications, if you are already a slight level of developer, you should always PreparedStatement instead of a Statement. In other words, at any time not to use Statement. Based on the following reasons: I. code readability and maintainabilit

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1 query fuzzy match Try to avoid in a complex query which uses LIKE '% parm1%' - Red percent sign identifies the location of the index will result in the relevant column can not be used, it is best not to use. Solution: In fact, only a little script

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http://blog.csdn.net/tianlesoftware/article/details/5827245 http://blog.csdn.net/tianlesoftware/article/details/5826546 If you want to analyze the SQL performance on a particular issue, usually we have to look at the SQL execution plan to see each st

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Mode design of the fundamental solution: 1 to avoid excessive Join, less duplication of overhead; (2) reduce space, lower table scan IO; 3. To ensure that the index is being fully utilized and the Query Cache In short, according to the actual databas

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Reproduced: http://www.williamlong.info/archives/1476.html Some time ago for an enterprise application to a Web site optimization analysis to solve this Web site often crashes and high CPU load problems, according to my contact with some of the appli

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Replication (Replication): performed by copying the statements or data set copy from the master server to one or more servers from multiple database synchronization between the database server. MySQL's built-in replication capability is the foundatio

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Ordinary PC test performance comparison: 1. PostgreSQL8.4 for use PostgreSQL9.0, the performance substantially. Single-table queries about 100,000 recorded in the 40s wandering around before but need to 130s yo. 2. MySQL7.0 study for a while, is the

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oracle SQL performance optimization will not only do we have to write SQL, but also do write excellent performance of SQL, the following is the author study, abstracted, and summarized some of the information to share with you! (1) choose the most ef

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SQL code performance optimization in traditional database optimization theory, there are some controversial issues, such as: Traditionally, the database through the use of indexes on tables will be able to walk faster, but in the actual database syst

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Chapter myisam, blob and text can be based on the first 500 bytes, create an index myisam fulltext support Delay index update (Delay_key_write) CREATE TABLE `table3` ( `Id` INT (11) NOT NULL AUTO_INCREMENT, `Name` VARCHAR (30) DEFAULT NULL, `Id2` INT

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Oracle performance optimization basic methodology included several steps, including: 1) setting up a reasonable goal of Oracle performance optimization. 2) Measure and record the current Oracle performance. 3) determine the current performance bottle

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Overview of DB2 Performance Optimization DB2 performance tuning is a more complex and comprehensive nature of the work, the source of the problem need to make a comprehensive exploration and reflection. Also need a more profound knowledge of database

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First, This is a tutorial on MySQL performance optimization to a certain company's DBA, was originally used to train employees, and now reproduced it for everyone to learn to improve. Background and objectives ● staff training and sharing. ● For user

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Problem: Project workflow system, workflow core sheet involves three tables, respectively, Table A: Work Order Form Table B: work order task table Table C: work tasks in a single table With the dramatic increase in the amount of data, Table C to 100

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Today, the operation of the database application performance is increasingly becoming the bottleneck, and this is particularly evident for Web applications. On database performance, this is not just DBA need to worry about things, and this is our pro

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Abstract: The physical structure of the Oracle database system and logical structure analysis, described in Oralce database design and development phase to optimize the performance of some strategies and methods. Keywords: Oracle Database Performance

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To master MySQL road is tough, but fortunately a variety of relational database similar enough so that I rose to CRUD database architecture and performance tuning. During this period of the concepts is not long-winded, and I can hardly express very c

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(1), max_connections While the number of customers allowed. Increasing this value increases the number of file descriptors that mysqld requires. This figure should be increased, otherwise, you will often see too many connections error. (2), record_bu

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Author: andyao Original link: http://andyao.iteye.com/admin/show/144033 Please help earn reproduced 1 Introduction <br /> slightly (2) database design and query optimization <br /> slightly 2.1 Schema Design Schema optimization will be run dep

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In JDBC applications, if you have a slight level of developer, you should always PreparedStatement instead of a Statement. In other words, at any time not to use Statement. Based on the following reasons: I. code readability and maintainability. Alth

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The following script can be compared with the visually see the db buffer cache in the object occupancy, which in the performance optimization of a relatively large reference value select decode (pd.bp_id, 1, 'KEEP', 2, 'RECYCLE', 3, 'DEFAULT', 4, '2

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My favorite question during Interview for people to work as MySQL DBAs or be involved with MySQL Performance in some way is to ask them what should be tuned in MySQL Server straight after installation, assuming it was installed with default settings.

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Optimization of the core is actually a database configuration parameter adjustment. In this paper, a simple parameter adjustment, hundreds of thousands of lines have a table group by optimization example. By this simple adjustment, the database perfo

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Abstract: In the data warehouse environment, due to large amount of data generated by processing efficiency, this in-depth analysis of the ORACLE table several connections, characteristics, scope, and how to use and optimized for a detailed discussio

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A description of the problem *** Database due to the recent volume of business increased, persistent transaction response is slow, at its peak (9:00 or so) or even get stuck, and that leads prospects unable to respond. Continuous observation by remot

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In 1983, OracleV3 database publishing, became the industry's first to support PC, minicomputer, and the host database August 1991, Oracle established in Beijing, a wholly-owned company, its Chinese name "Beijing Oracle Software Systems Co., Ltd."

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My view is that the foreign key in the initial stage can be added all together, and only when it is forced to disable or drop off. Experiencing performance bottlenecks, try other ways to tune, and not easily sacrifice the foreign key. There are forei

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