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Use Windows performance monitor to monitor common SQL Server metrics
As mentioned in the above article, Win's Performance Monitor is an essential tool for monitoring database performance. Next I will introduce some common monitoring metrics, which are nothing more than disks
Some common performance problems in SQL Server:
1. When optimizing the query, try to avoid full table scanning. First, consider creating an index on the columns involved in where and order.
2. Try to avoid using left join and null values. Left join consumes more resources than inner join because it contains data that m
what you need to do, especially if you use a linked server (linked server) in your SQL statement, for example, I have encountered a SQL statement similar to the following, executed for 10 minutes
1:select *
2:from localtable
3:where Somecolumn
4: (SELECT COUNT (*)
5:from RemoteServer.SomeDB.dbo.SomeTable
6:wher
Label:The above article mentions that win's performance Monitor is a necessary tool to monitor database performance, and then I will introduce some common monitoring indicators, in fact, the disk, CPU, memory and other hardware operating indicators and the database itself like the lock Ah, the number of user connections Ah, There are parameter indicators that need attention according to their own business d
In SQL Server, the inner join,outer Join that is common between tables and tables is executed by the engine based on the selected column, whether the data is indexed, and the selectivity of the selected data is converted to loop Join,merge Join,hash Join one of the three physical connections. Understanding that these three physical connections are the basis for solving
1. UseProgramTo minimize the number of accesses to the database. By searching for parameters, You can minimize the number of rows accessed to the table and the result set, thus reducing the network burden; separate operations should be processed separately to improve the response speed each time. When using SQL in the data window, try to place the indexes in the first column selected;
AlgorithmThe structure should be as simple as possible; During th
1. UseProgramTo minimize the number of accesses to the database. By searching for parameters, You can minimize the number of rows accessed to the table and the result set, thus reducing the network burden; separate operations should be processed separately to improve the response speed each time. When using SQL in the data window, try to place the indexes in the first column selected;AlgorithmThe structure should be as simple as possible; During the q
to pssdiag is as follows:
Pssdiag is a general purpose diagnostic collection utility that Microsoft Product Support Services uses to collect various logs and data files. pssdiag can natively collect performance monitor logs, SQL profiler traces, SQL Server blocking Script output, Windows event logs, and sqldiag output
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
With the growth of time, the company's database will be more and more, query speed will be more and more slow. Open the database to see hundreds of thousands of of data, the query is inevitable not waste time.
To improve SQL query effectiveness, you will generally want to build indexes (index) as the first consideration. In fact, in addition to the establishment of the index, when we are in the SQL command
Brief introductionSQL Server Query Analyzer is cost-based. Typically, the Query Analyzer determines how to choose an efficient query route based on predicates, such as which index to choose. And every time the Query Analyzer looking for the path, and not every time to statistics the number of rows included in the index, the range of values, but based on certain conditions to create and update the information after the save to the database, which is ca
During the work period, the problem of exporting and importing data between databases of different versions is often involved. Simply sort it out and compare the performance. You are welcome to discuss and supplement some methods that are missing.
00. Create a test environment
01. use SQL Server Import and Export Tool
02. Use generate scripts
03. Use BCP
Sometimes, all you do to make the application run faster
WorkMake some minor adjustments here or there. But the key lies in determining how to adjust it! Sooner or later, you will encounter this situation:
SQLThe query cannot respond as you want. It either does not return data or takes a surprising amount of time. If it reduces the speed of enterprise applications, users must wait for a long time. Users want their applications to respond quickly and their reports can return analysis data instant
This article discusses how to improve the performance of SQL Server databases. BKJIA database channel recommends "getting started with SQL Server" to help you better understand SQL Server
1. PrefaceFor the optimization of SQL statements or stored procedures, the former mainly use the following statements to determine the specific execution time, but the SQL environment is complex and changeable, the following statement does not accurately determine whether the performance is improved, if you need to know the CPU, IO and other information, there is
Tags: des style blog http color io os ar strongOriginal: 5. SQL Server database performance monitoring-current requestFor systems running on-line, current database performance monitoring typically monitors the following points:(1) Whether there is obstruction (Blocking);(2) whether there is waiting (waiting), blocking
not very useful because the connection command is not included in the query, but this information is useful if the query contains one or more connections.The scan count value for a table outside a loop is 1, but for a table within a loop, its value is the number of cycles. As you can imagine, for a table within a loop, the smaller the value of its scanner, the less resources it uses, and the higher the performance of the query. Therefore, when adjust
Server CountersThe Access Methods object in SQL Server provides a counter that monitors access to logical data in the database, and the Buffer Manager counter monitors physical access to the database on disk. Access Methods access Mode Access methods monitors the methods used to access data stored in the database to help determine whether you can improve query
Tags: performance optimization for SQL Server administrator-required skillsPerformance optimizations for SQL Server administrator-required skillsSQL Server is one of the essential services of the enterprise, so it is a great chall
I. Concept and classification of indexesThe concept of indexing everyone knows that we also use common clustered indexes, nonclustered indexes in our daily development. However, in addition to these two, SQL Server also provides other indexes, such as:A. Unique index: An index that does not contain duplicate keys, and either a clustered index or a nonclustered index can be a unique index.B. Index containing
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