sql server varchar max performance issues

In a large database, performance has become one of the focuses of attention. How to Make the efficient and effective operation of the database become an issue that must be considered by database administrators and developers. Performance is the measure of efficiency when one or more applications run in the same environment. Performance is usually expressed by res

One, the creation of an instance of a COM component with CLSID {AA40D1D6-CAEF-4A56-B9BB-D0D3DC976BA2} from IClassFactory failed.Respect the original works: reproduced in this article from http://www.haogongju.net/art/2061733Problem descriptionError: Failed to create maintenance plan when new maintenance plan was created. Additional information: Failed to create instance from IClassFactory for COM component with CLSID {17bca6e8-a95d-497e-b2f9-af6aa475916f} Because of a later error: c001f011. (Mic

Label:Some problem solving methods for installing sqlserver20081, the installation of SQL Server appears as shown, the solution is: start → run → input "regedit" → find "hkey_local_machine\system\currentcontrolset\control\ Session Manager "Click the item and delete" PendingFileRenameOperations "to the right. 2, installation fails, uninstall clean SQL Server.Metho

groupsPerformanceIt is also higher than the query for the entire table.Performance. In fact, SQL Server 2005 already contains the partition function. Even before SQL Server 2005, a function called "Partitioned Views" exists, you can Union a table with the same structure in a View to achieve the same effect as the curr

milliseconds) above and the maximum wait time as a reference. Using the information provided by Sys.sysprocesses to count, about sys.sysprocesses use can refer to "SQL Server performance tuning from user session state analysis". This view listens for blocking information over a period of time. You can set a monitor statement to run every 10 seconds, storing bloc

Label:SQL Server Database performance optimizationRecent project needs, did a period of time SQL Server performance optimization, encountered some problems, but also accumulated some experience, now summed up, with June share. SQL

Tags: io using SP data issues AD BS database serverIt is dangerous to allow SA users to be remote. The recommended practice is to create a new local user that allows remote connections.1. Enable the TCP/IP protocol.2. Configure the listening port (1433).Net-an Check if the local port is listening, use the online IP port test tool to test if the remote port is open.3. Create a remote login user4.1. Using Management Studio ExpressWithWindowsAuthenticati

This article transferred from: http://blogs.msdn.com/b/apgcdsd/archive/2012/01/18/sql-server-2012-1-18.aspxSeveral common factors affecting application performance of SQL Server databasePerformance issues are one of the common pro

processor.Processor: % Privileged TimeIf the value of this parameter and the value of Physical Disk remain high, it indicates that I/O is faulty. Consider replacing a faster hard drive system. In addition, you can set Tempdb in RAM to reduce "max async IO" and "max lazy writer IO.Processor: % User TimeIndicates CPU-consuming database operations, such as sorting and executing aggregate functions. If the val

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

Tags: data SP problem BS database server SQL as installationWhen SQL Server accesses a database table in Oracle remotely:The remote syntax is typically: SELECT * from OpenQuery (Oracle linked server name, ' query statement ')Eg:select * from OPENQUERY (QTX, ' select * from s

Sqlserverb column are sql_latin1_general_cp1_ci_ai. This can be caused by the initial data or ETL help generating the table, which causes the column to be sorted as Sql_latin1_general_cp1_ci_ai. Delete tables, import data from SSIS data sources to Sqlserverb, automatically create tables (note that there are times when you need to manually modify a generated table's SQL). At this point the column is sorted correctly, as long as

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

SQL server2005 failed: error40; unable to open the connection to SQL Server, set TCP/IP and other issues that cannot be connected. TCP/IP is set to allow. The username and password are correct. Sqlserver2005 built-in management tools can be connected. Server address of t

. To start immediately installation , click Run. To later installation SSMSE, click Save. Step 4: In the Readme file, follow the installation Instructions for installation . Note because it is an. msi file, run as an administratorinstallation。。。 But this software does not have an administrator's identity to run ... So use the following method: 1: Create a new Notepad, enter the MSIex

Label:Original: Resolve SQL Server execution script, file too large, memory overflow problemExecutes the. SQL script file, if the file is large, the execution will have a memory overflow problem, the command can be substituted for cmd inputOsql-s 127.0.0.1,8433-u sa-p sa-i d:\sql.sql,-s server name-u user name-p passwo