identify poor performance in sql server

Is it possible to answer this question in just a few seconds? You may try to view the performance counters in Performance Monitor PerfMon. There are about 1000 counters with different names. You may ask: "Skipped Ghosted Records/sec" number of phantom Records Skipped per second) = 10. Is this value good or bad? The correct answer is that this value may not be important. However, some counters are really imp

Requirements DescriptionIn a production environment, it is often necessary to collect data to locate a problem or to form a baseline.There are many ways to solve the data acquisition in SQL Server, such as trace, Profile, SQLdiag, extended events and so on.Several scenarios have pros and cons, with the beginning of the SQL Server2012 version, Microsoft's start to

SQL Server CPU performance check and optimization related SQL statements, very good SQL statements, recorded here: -- Begin SQL related to CPU Analysis and Optimization -- use DMV to analyze statements that have used the most CPU

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

creation of 249 non-clustered indexes; SQL Server 2008 and SQL Server 2012 allow creation of 999 non-clustered indexes] Generally, when you create a unique key (unique key) on a field, SQL Server automatically creates a non-clust

the data is consistent, but nothing is perfect. The cost of the Begin Tran is that all the resources locked by the SQL statements cannot be released until the commit is committed before committing.It can be seen that if the BEGIN TRAN too many SQL statements, the performance of the database is poor. Before this large

Query OptimizerThere are rules in each field. In the simplest way, if you do not conform to the C # specification for programming, such as incorrect keyword usage, an error will be reported during compilation. Of course, there are some hidden rules in each field, and some people may say that they are "hidden rules". These rules are often not clear. For example, if you do not conform to the best practices to write a program, compilation will not report an error, but the

Many of my friends may be making mistakes in performance optimization as described below. If you have any need, please refer to the mistakes in SQL Server query performance optimization to get out of the index. Many of my friends may be making mistakes in performance optimiz

After a period of research, we started to optimize the performance this week. Before optimization, I will summarize some of the information I have investigated. 1. Background This is a system developed in the past 03 years. NET 1.1 + SQL Server 2000, the operating system uses Windows2003. After so many years of use, the operating system was upgraded (from Windows

performance of the two-range query with YY_BH Index is certainly greatly improved.9. Appropriate and inappropriate in the query conditionsQuery parameters can include actions: =, Inappropriate query parameters are: not,! =, 10. Use Delete sparinglyIn general, some of the logic of deleting data will be implemented more or less in stored procedures. For a small number of tables, the problem is not very big. But for large data tables, deleting data with

Tags: des style blog http ar io color using SPSQL Server Performance Counter schema Introduction to Windows Performance counters The operating system can use the Performance Monitor graphical tool to measure performance information for systems, applications, se

option (Force order), pay attention to the wording itself is not the small table at the front,In complex cases, although the problem is caused by the sequence of drivers, the option force order does not necessarily make sense, because when a multi-table connection is made, it is not necessarily a reasonable driving order to drive in a written manner.Even more serious problems arise, refer to: http://www.cnblogs.com/wy123/p/6238844.html, so it is not recommended to mess with option (Force order)

server| View | index | performance What is an indexed view? For many years, Microsoft®sql Server™ has been providing the ability to create virtual tables, called views. In the past, these views have two main uses: Provides a security mechanism for restricting users to a subset of data in one or more base tables.Provide

, Daysarray.length-2, Guidarray, guidarray.length-6, 2);Array.copy (Msecsarray, msecsarray.length-4, Guidarray, guidarray.length-4, 4);return new System.Guid (Guidarray);}Generate time information from the GUID returned by SQL SERVERpublic static DateTime Getdatefromcomb (System.Guid Guid){DateTime basedate = new DateTime (1900,1,1);byte[] Daysarray = new Byte[4];byte[] Msecsarray = new Byte[4];Byte[] Guidarray = GUID. Tobytearray ();Copy the date par

high-performance applications. I am not a DBA, but an ordinary developer. The above are some experiences and experiences in my practical work. In view of my very limited level, if you say something wrong or cannot understand it, I hope you can correct it to avoid misleading others. I am very grateful. In the future, I will continue to write some practical experience on SQL

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

Comparison of paging stored procedures and performance of five types of SQL Server, SQL stored procedures In SQL Server database operations, we often use stored procedures to implement paging processing of the queried data to faci