sql server performance monitor counters

stress treatment measures, often results will be unsatisfactory. Think like Query OptimizerIn every field there are rules in their domain, and most simply, if you do not conform to the C # specification for programming, such as using keywords incorrectly, then the compilation will be an error. Of course, there will be some hidden rules in each area, and some people will say is the so-called "unspoken rules", such rules are often not materializing, such as you do not meet the best practice to wr

SQL Server's common performance problems can be considered in three aspects: operating system and database configuration, table/index/storage settings, and SQL statements. For delivered systems, it is often difficult to optimize SQL statements due to actual conditions. This article summarizes the practical methods for

asp.net Application Performance Statistics class Most of the information about ASP.net application performance statistics is recently sorted into a comprehensive document called "improvement." NET application performance and extensibility ". The following table describes some important statistical classes that monitor

(' (event[@name = "Xml_deadlock_report"]/@timestamp) [1] ', ' datetime ') execution_time,xml_data.value (' (Event/data/value) [1] ', ' varchar (max) ') Queryfrom (select Object_name as Event, CONVERT (XML, Event_data) as Xml_datafrom sys.fn_xe_file_target_ Read_file (' C:\temp\deadlock*.xel ', ' C:\temp\deadlock*.xem ', NULL, NULL)) v ORDER by Execution_time--If you want the session to stop capturing events (until you enable the session again), you can use this query:alter EVE NT SESSION [Deadl

We can use set statistics Io and set statistics time to analyze the performance of T-SQL statements. The method is as follows: In the SQL Server Query analyzer, run: Set statistics profile onset statistics Io onset statistics time ongo -- // The SQL statement to

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

competition for data cache, process cache, system resources, and CPU. SQL Server has the following optimization levels: · Application Layer-most performance gains come from the optimization of queries in your SQL application, which must be based on a good database design. · Database layer-resources shared by applicati

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

In the official blog of Microsoft Asia-Pacific Database Support Group, you will find that many articles use the Procmon.exe tool. Today I would also introduce this tool How big is the experiment based on this article, SQL Server, per log write? " Download address for this tool:http://files.cnblogs.com/lyhabc/ProcessMonitor.zip The test content in the article is like this What is the minimum size of

1. Select the most efficient table name order (valid only in the Rule-based optimizer) The SQL Server parser processes the table names in the FROM clause in Right-to-left order, therefore, the last table in the FROM clause (driving table) is processed first, and in the case where multiple tables are included in the FROM clause, the table with the fewest number of records must be selected as the underlying

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

Label:Source code files 1, what is a performance issue? If the existing resources do not reach the maximum throughput, the system cannot meet the reasonable expected performance, then it can be defined as a performance problem. Performance metrics include: response time, throughput, scalability. 2, a preliminary stud

1. Query:SELECTec.client_net_address, es.[program_name], es.[host_name], Es.login_name,COUNT(ec.session_id) as [Connection Count] fromSys.dm_exec_sessions asesINNER JOINSys.dm_exec_connections asEc ones.session_id=ec.session_idGROUP byec.client_net_address, es.[program_name], es.[host_name], Es.login_nameORDER byec.client_net_address, es.[program_name];2. Perfmon:Addcounters, Sqlserver:general Statistics, User ConnectionsMonitor the number of connections for the current

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

Some factors that affect the performance of SQL Server databases and the principle of optimizing the performance of SQL Server, and some guiding principles are proposed to optimize the perform