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SQL Server blocking (from Microsoft Technical Support staff)

server| Microsoft Blocking definition =============== Blocking occurs when the first connection from the application controls the lock and the second connection requires a conflicting lock type. The result is to force the second connection to wait

How to make your SQL run faster!

First, unreasonable index design ----Example: The table record has 620000 rows, and the following SQL runs under different indexes: ----1. A non-clustered index was built on date Select COUNT (*) from the record where date > ' 19991201 ' and date 20

DataGuard-use cascaded Redo Log destinations to avoid WAN stability issues

The problem has recently been a headache in the Dataguard environment in the event that a network failure would result in a primary library not working properly within a short period of time. The phenomenon of this problem is basically this: When

Library Cache Lock Solution case

cache| Solution In the afternoon, the business staff reported that any operations related to the Zzss03201281cs_no table would be hang, including Desc zzss03201281cs_no, and hang there. The first feeling was locked, so I looked at the lock Sql>

Automatic blocking of illegally connected FTP IP methods

Because of the provision of FTP downloads and restrictions on the thread, so always found that someone is constantly using multithreading to try, this will greatly increase the load on the server, this kind of thing "harmful to others"! In order to

In-depth analysis of IIS 6.0 (14)

Iis For an IIS server, it is not the name of the Web site that uniquely identifies a Web site, but the ID value of the site. When we create a new Web site in IIS 5.0 and IIS 4.0, the Web server assigns the next available numeric order number to the

10 rules that kill IIS server performance

iis| Server | performance Each of the following commandments will effectively affect the performance and scalability of your code. In other words, try not to follow the precepts as much as possible! Below, I'll explain how to break them to improve

node, did you hear? The life of node and the applicable scene

Article Introduction: What is node? Translator Press: OReilly recently a booklet "What is Node?", a brief explanation of Node's life and the application of the scene, the author easy and smooth, full content, is very rare learning

Form validation Control Validator4.0 Beta tutorials and downloads

Tutorials | control | download | form Verification |validator| I foshan people 4.0 features 1. Support AJAX Validation 2. Implementation of password security level verification and display 3.5 Ways of configuring 4.6 Types of message prompt mode 5.

PHP extension and Embedding--resource data type 2

Complex data types stored in resource variables typically require some memory allocations, CPU time, or network traffic when initializing. However, keeping the resource similar to the database connection between requests must be sustained. The

Apache Setup and PHP version selection

Lamp Environment Building is a very popular framework for web development, but the version of the corresponding choice for the configuration is very important, today on the Internet to check the relevant information, do some about the Apache version

The persistent connection between MySQL and mysqli in the PHP API

A long time ago, I also because of the work of the bug, the PHP MySQL client connection driver Mysqlnd and libmysql between the difference between PHP and MySQL communication that thing, this time again encountered a connection with their things,

Servlet and JSP Performance tuning technology

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 performance of your Java EE

Can you pass it? A collection of questions on Java EE face (with answers)

J2ee /*** by Metaphy 2005-11-12* version:0.01* Note: The answer comes from metaphy past knowledge or network, metaphy can not guarantee its correctness or integrity, for reference only**/ First, the basic question and answer   1. Which of the

Research and application of database connection pool technology based on JDBC

Data | database | database connection SummaryThis paper introduces the principle of Java Access database and its existing problems, puts forward the solution-database connection pool, analyzes its key problems, constructs a simple and easy-to-use

Web site security can not be ignored: a charging JSP site to crack the process

js| Security | process | cracking One day on the internet accidentally opened a website, there is plmm and you video chat, but to mobile phone registration fees. Just want to find if there is a loophole can not spend money on the chat with MM. First

Deep analysis of the Spring MVC framework

In today's MVC framework, it seems that WEBWORK2 is gradually becoming mainstream, and the combination of webwork2+springframework is becoming more and more popular. This seems to imply that spring's own MVC framework is far worse than WEBWORK2, so

Upgrade the JSP application of the seven cheats trick

Js| program you are often complained of by customers JSP page response speed is very slow? Do you think your Web application can withstand ever-increasing amounts of traffic when the number of customer visits is soaring? This article describes some

Six big questions that Java beginners have to understand

Beginners | Questions for this series of questions, every Java learner should understand. Of course, it doesn't matter if you just learn to play Java. If you think you have gone beyond beginners, but do not understand these questions, please return

My understanding of Java's package and import mechanism (beginner's experience)

Beginners | experience The following test conditions are on your machine, set the path command path= d:\jdk1.4\bin;d:\jdk1.4\lib, and you can perform the Java and Javac commands normally without setting the classpath path. Talking about

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