disk access

This is the true question of our operating system: To solve this problem, we must have a general understanding of how the disk reads and writes data, the following are some of your knowledge in this area:   1: If the length of each logical record of

This article takes the MySQL database as the research object, discusses some topics related to the database index. In particular, MySQL there are many storage engines supported, and the various storage engines support the indexes differently, so the

Because waiting for an application to start is a frustrating thing for many users, focusing on improving the startup performance of client applications will greatly enhance the customer's first impression and impress them on the results of your

WindowsServer2003 + IIS6.0 + ASP Server security Settings--component security Settings Chapter A, uninstall the Wscript.Shell and Shell.Application components, save the following code as one. BAT file Execution (minutes 2000 and 2003 systems)

Reader to like: Developer: If you are doing database development, the content of this article is very suitable, because this article is from the programmer's point of view on database performance optimization. Architect: If you are a database

mysql| Data | database | optimization Database system is the core of MIS, and online transaction processing (OLTP) and online analytical Processing (OLAP) based on database is one of the most important computer applications in banks, enterprises and

Database system is the core of MIS, and online transaction processing (OLTP) and online analytical Processing (OLAP) based on database is one of the most important computer applications in banks, enterprises and government departments. From the

Reading the information on the hard drive or writing it to the hard drive is almost the "compulsory course" we have to do every day. However, in the process of frequent access to the hard drive, we will occasionally find some strange "harassment"

Basic parameter setting of "Standardcmossetup" system The main function of this option is to set the system basic parameters. The user can choose the item to be set by the way of moving the light bar, and use the key to modify the content. In each

Original address: http://blog.codinglabs.org/articles/theory-of-mysql-index.htmlThe nature of data structure and algorithm base indexThe official MySQL definition of an index is: index is the data structure that helps MySQL to get data efficiently.

First, directory PreparationMkdir-p/home/db2inst1/db2_backupMkdir-p/home/db2inst1/db2_archiveMkdir-p/home/db2inst1/db2_logChmod-r 775/home/db2inst1/db2_backupChmod-r 775/home/db2inst1/db2_archiveChmod-r 775/home/db2inst1/db2_logChown-r

System LockShow processlistStatus entries in Show Processlist output: 5.1 None of the manuals, or the translation of the problem, are accompanied by 5.5 original description:After createThis occurs when the thread creates a table (including internal

Long time no article, before the system officially launched, the DBA will generally test the performance of the serverFor example you have a lot of servers, some do Web server, some do cache server, some do file server, some do database serverThe

Original source: MySQL 5.5 Reference ManualPart of the translation: "mysql_5.1 Chinese reference Manual"Reprint please specify the original link http://www.cnblogs.com/lenagt/archive/2012/06/06/2538201.html Thank you.---------------------------------

1. Buffer and CacheThe free command provides a more concise view of system memory usage relative to top:[[email protected] ~]$ free-m--in megabytesTotal used free shared buffers Cachedmem:32109 30133 1975 0 472 16881-/+ buffers/cache:12780 19328swap:

The performance of SQL Server databases has not been written for a long time. Before the system is officially launched, DBAs generally need to test the server performance. For example, you have many servers and some are web servers, some are cache

Oracle DatabaseIt is widely used in various fields of society, especially in the Client/Server mode. However, application developers often encounter the problem that the performance of the entire system decreases significantly as the data volume

Environment product: DB2 UDB Platform: cross-platform Version: 8.2 (8.1 patch 7) Problem DB2 UDB High Availability disaster recovery (HADR) is a database replication feature that provides high availability solutions for partial and entire site

Isoemu 1.09 This tool can start with ISO under DOS, and display the ISO startup screen. : Http://www.qinzhi.com.cn/Soft_Down.asp? Urlid = 1 & softid = 156 How to Use===== A) use the ntldr menu 1) Put ieldr in your c:/, modify boot. ini, and add the

Principles and methods for adjusting the performance of Oracle Application Systems Reprinted Source: China IT lab Author: Unknown Abstract:This article discusses and studies the features and