index performance tuning in sql server

Http://www.cnblogs.com/shanyou/archive/2013/02/12/2910232.htmlSQL Server Performance Dashboard reports is a set of Reporting Services reports that are used with reports that are described in SQL Server Management Studio. These reports allow database administrators to quickly determine if bottlenecks exist in their syst

constraints; to ensure that each inserted, updated, or deleted record meets the constraints, SQL Server needs to consider whether to add constraints to a table with a large amount of data.VarcharVARCHAR is a common type of database, but it may also lead to unexpected performance overhead. Every time we store variable-length columns,

are in order.Then, when SQL Server is doing all of these things, it creates locks to ensure that users get meaningful results. SQL Server guarantees that when each statement is executed, the database is fully predictable (for example, predicting how SQL executes) and managi

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 server to do the database

During database design, sometimes attribute record values belonging to the same person are stored in multiple records for the purpose of data standardization, you want to merge multiple attribute data into one row for display. This is a row-to-column conversion. For example, the score table. What is the efficiency of Row-to-column conversion? I tried the following three methods to perform a row-to-column test. The number of records in the test data table is 120Tens of thousands of fields1

Label:Original: SQL Server performance Tuning (i)--judging system resource bottleneck from waiting stateView the status of all SQL Server tasks at that time (sleeping, runnable, or running) through the DMV2005, 2008 provides the following three view Tudon detailed query:

Original: Set STATISTICS io and set STATISTICS time in SQL Server query performance optimizationIn recent times, has been exploring the SQL Server query performance issues, of course, also aimless search for a lot of information,

, and the virtual memory counters are two main: Paging file:% usage to monitor the usage ratio of Paging File instances Process:paging File Bytes to monitor the size of virtual memory The more data stored in virtual memory, the greater the gap between the amount of physical memory and the actual demand, the ratio% Usage is only as a reference value, and if the long time is close to 100%, then the system is likely to be abnormal. Second, monitor

Label:Today I would like to talk about a special topic in SQL Server--Instant file initialization (Instant initialization). For your instance of SQL Server, if you enable Instant file initialization, you will get a huge performance boost under certain circumstances. Instant

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 servers, some are file serv

Designing 1 of applications does not seem to be difficult, but it is not easy to achieve the optimal performance of the system. In the development tools, database design, should The structure of the program, query design, interface selection and so on have a variety of options, depending on the specific application requirements and development team skills. This article takes the SQL

Tags: des c style Blog Code AOriginal: [Translate]--SQL server 5 performance killers using linked serversForeword: This article is to blog http://www.dbnewsfeed.com/2012/09/08/5-performance-killers-when-working-with-linked-servers/ Translation, if the translation is not good or bad place, please point out, we study pro

Foreword: This article is to blog http://www.dbnewsfeed.com/2012/09/08/5-performance-killers-when-working-with-linked-servers/ Translation, if the translation is not good or bad place, please point out, we study progress together. Respect the original and translated labor results, please indicate the source when reproduced. Thank you!When using a linked server (Linked Servers), the most expensive cost is th

instances process:paging File Bytes to monitor the size of virtual memory The more data stored in virtual memory, the greater the difference between the amount of physical memory and the actual demand, the value is only as a reference value, and if it is close to 100% for a long time, then the system is likely to be abnormal. Second, monitor SQL Server usage of memory resources from the