db2 sql performance tuning

The db2 tutorial is: Tips for improving INSERT performance in DB2 (1 ). INSERT Process OverviewFirst, let's take a quick look at the processing steps when inserting a row. Each step in these steps has the potential for optimization, which will be discussed later. Prepare the Statement on the client. For dynamic SQL s

Original: 2-year summary of SQL Server DBA tuning2 years SQL Server DBA Summary of tuningWhen I was 2 DBA I felt that there was something that needed to be shared with everyone to discuss the book first.Book List1. "In-depth analysis of SQL Server 2008 series" This is the MSSQL 2005 Technology Insider series. Version 2012 also out of interest can see, Technical I

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

rich, powerful, and flexible, and you can do a variety of tasks with it, and in this article we'll discuss some tips for improving the performance of Linux servers.1. Tuning the Linux kernel elevator algorithm for disk I/OAfter selecting the file system, there are some kernel and mount options that may affect its performance, one of which is the elevator algorit

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

, connection pooling, and so on, in the design phase, as appropriate for the business. 2. Code tuning: Development PhaseThis is the developer is most familiar with, do the overloading should have feelings, the same function, good implementation and bad implementation is very far. be careful to avoid deadlocks, dead loops. 3. Database tuning: Development phaseJava programs can connect to a database using JDB

analysis of Web container thread pool server > Application server > (server name) > Thread pool > Webcontainer minimum Size: 10 Maximum size: 50 monitor Web container thread pool maximum by TPV (within acceptable time range), set EJB cache server > Application server > (server name) > EJB tell cache set > EJB cache setting > Cache large Small cache Size: 2053 Purge interval: 3000 For example through TPV monitoring found that Ejbstore () has a high call rate and CPU utilization is very low, can

Brief introduction When you want to ensure that enterprise applications built with IBM db2®universal database™ (DB2 UDB) and borland® tools (such as delphi™, c++builder™, or kylix™) have the best performance, programmers can take advantage of the DB2 Optimizer's ability to Force to handle even "difficult"

more information: Open source distributed database middleware mycat:http://blog.oldboyedu.com/mysql-mycat/Mycat: Open Source distributed database middleware: http://www.csdn.net/article/2015-07-16/2825228 Mongodb I've heard about it a few years ago, just know it's a nosql database, knowing that the storage format is JSON and is a file database. MongoDB supports sharding: Concrete implementation: http://my.oschina.net/ydsakyclguozi/blog/268377 PostgreSQL

Some small aspects of database Performance tuning:1. 1 Performance IndexDatabase performance is generally measured in two metrics: response time and throughput. The faster the response, the greater the throughput and the better the database performance. Response time and thr

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 has good

familiar with design methods, design patterns, basic performance components and common optimization ideas. Code Tuning-micro-tuning, focusing on performance differences in implementation JVM tuning-the memory of a late development requires a certain understandin

to be using indexesproperly# File restriction CheckOPEN FILES LIMITCurrent Open_files_limit = 65535 filesThe open_files_limit should typically beset to at least 2x-3xThat's Table_cache if you have heavymyisam usage.Your open_files_limit value seems to befine# variable Cache CheckTABLE CACHECurrent Table_open_cache = 4220 tablesCurrent Table_definition_cache = TablesYou has a total of tablesYou have a tables open.The Table_cache value seems to be fine# Temporary table check status checkTEMP T

The following environments are representative of the general configuration and work environment of small and medium-sized enterprises. I hope this article will help you understand the MySQL database performance tuning method in Linux. 51CTO recommends the MySQL database getting started and proficient tutorial to you. Hardware preparation environment: Hard Drive: 16 SAS15KRAID5 with 512 MCacheCPU: Two AMD4 C

Js|servlet| Performance Overview In this article, Rahul Chaudhary describes the use of the Performance tuning technology (PTT performance-tuning techniques) to enhance the performance of servlets and JSP to improve the

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 Tuning Guidance outline Desi

, faster disk.2.5.1. Network performance evaluation（1）通过ping命令检测网络的连通性（2）通过netstat –i组合检测网络接口状况（3）通过netstat –r组合检测系统的路由表信息（4）通过sar –n组合显示系统的网络运行状态Three Linux server performance Tuning 1. Tuning the Linux kernel elevator algorithm for disk I/OWhen the file system is selected, the algorithm balances low latency requireme

, such as business logic, SQL optimization, algorithms and so onIn this example, the Linux kernel parameter adjustment, the network has more detailed parameters, please refer to:11 1In this test, the adjustment of the relevant one-piece is as follows:1, Resin to handle the adjustment of the service:Conf\resin.xml file parameter adjustment under Resin directoryfree-min>10m free -min>Specific adjustment methods, you can refer to the JVM

As mentioned in parts 1th and 2nd, there are several relatively easy steps to improve performance you can take, one of these steps involves using an automated tool to "guide" you to write SQL statements, there are many production performance analysis or performance tuning to

. Create_snapshot; We can also use the Dbms_workload_repository package to complete the baseline, the default settings and other operations.ADDM (Automatic Database diagnostic Monitor AWR)Oracle is an internal consulting system, can automatically complete the most database of some optimization recommendations, giveSQLThe optimization, the creation of the index, the collection of statistics and other suggestions.ADDM report Generation:Sqlplus>@?/rdbms/addmrpt.sqlThe most important part of Oracle