Check Query Performance In Sql Server

Designing 1 applications doesn't seem to be difficult, but it's not easy to achieve the optimal performance of the system. There are many choices in development tools, database design, application structure, query design, interface selection, and so on, depending on the specific application requirements and the skills of the development team. This article takes SQL Server as an example, discusses the application performance optimization techniques from the perspective of the background database, and gives some useful suggestions. 1 database design to achieve optimal performance in a good SQL Server scenario, the key is to have 1 ...

1.1: Increase the secondary data file from SQL SERVER 2005, the database does not default to generate NDF data files, generally have a main data file (MDF) is enough, but some large databases, because of information, and query frequently, so in order to improve the speed of query, You can store some of the records in a table or some of the tables in a different data file. Because the CPU and memory speed is much larger than the hard disk read and write speed, so you can put different data files on different physical hard drive, so that the execution of the query, ...

The core concept of sub-library table is based on MySQL storage. Solving the problem of data storage and access capacity, the product supports the database traffic of previous Tmall double eleven singles day core transaction links, and gradually grew into the standard of Alibaba Group access relational database.

In the development of friends especially and MySQL have contact friends will encounter sometimes MySQL query is very slow, of course, I refer to the large amount of data millions level, not dozens of, the following we take a look at the resolution of the query slow way. -Often find developers looking up statements that are not indexed or limit n, which can have a significant impact on the database, such as a large table of tens of millions of records to scan all, or do filesort, and the database and server IO impact. This is the case above the mirrored library. And ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host technology Hall Everybody Good, I am the A5 security group Jack, today communicates with everybody about the Web server security related question. In fact, in terms of server and site security settings, although I have some experience, but there is no research, so I do this lecture today when the heart is very uncomfortable, always afraid to say wrong will be mistaken for other people's things, there are wrong places also please point out, today is all about the exchange. Perhaps you have a security master or a master of destruction to see what I said ...

Intermediary transaction SEO diagnosis Taobao Guest Cloud mainframe technology Hall I believe that everyone has been suffering from the virus, the following is reproduced from the Self-Study programming network, see, Feel good, so special to the webmaster friends, intrusion detection is a very important day-to-day management of the server, but also managers must master skills. 　　The following author and everyone, a lot of attack, discerning the intrusion detection server. 1. View server status deploy the performance monitoring tool to implement real-time monitoring of the server this should be the standard configuration of the server. ...

The database server is actually the foundation of every electronic transaction, financial and enterprise resource Planning (ERP) system, and it often includes sensitive information from business partners and customers. Although the data integrity and security of these systems are important, the level of security checks taken against the database is not as high as the security measures of the operating system and the network. Many factors can disrupt data integrity and lead to illegal access, including complexity, poor password security, misconfigured, undetected system backdoor, and mandatory routine use of adaptive database security methods ...

It is well known that the system reads data from memory hundreds of times times faster than it does from the hard disk. So now most of the application system, will maximize the use of caching (in memory, a storage area) to improve the system's operational efficiency. MySQL database is no exception. 　　Here, the author will combine their own work experience, with you to explore the MySQL database Cache management skills: How to properly configure the MySQL database cache, improve cache hit rate. 　　When will the application get the data from the cache? Database read from server ...

5K Project is the milestone of the flying platform, the system in scale, performance and fault tolerance have been a leap-type development to reach the world's leading level. 　　Fuxi as a flying platform distributed scheduling system, can support a single cluster 5000 nodes, running 10000 jobs, 30 minutes to complete the 100TB data Terasort, performance is at that time Yahoo! in the Sortbenchmark of the world record twice times. Fuxi introduced "Flying" is Alibaba's cloud computing platform, which distributed scheduling system is named "Fuxi" (Code name f ...).

The intermediary transaction SEO diagnoses Taobao guest cloud host Technology Hall last chapter I said a lot about fiddler things. 　　There are many detection tools available, such as Fiddler, Chrome, firebug, receptacle Monitor, IIS, and some third-party service. First of all, let's go back to the fiddler feature "Fiddler" tracking tool, especially for the HTTP display requ ...