ltrim rtrim performance in sql server

I. Preface After the new installation of SQL Server 2005/2008, We need to configure SQL Server Based on the server's hardware and software facilities to achieve better performance. However, the default configuration is used in most cases. Ii. Configuration 1.

Tags: time interval fetch number release operation rebuild file GIF world loadThe IO performance of SQL Server is affected by the IO latency of the physical disk and the IO operations performed internally by SQL Server. When monitoring disk

The impact of Tempdb on SQL Server performance optimization and tempdb Performance Optimization First, consolidate the basic knowledge of tempdb. Introduction: Tempdb is an important part of SQLServer, which is used to store temporary objects. Tempdb is an SQL

Windows Server 2008 R2 en enterprise 64bitSQL Server 2008 R2 en enterprise 64bit Symptom: the performance counters related to SQL Server are not displayed in Performance Monitor. Solution: Rebuilding the counters:CD c: \ window

Tags: Data Warehouse res warehouse IMA Misc SYS cell nbsp HighlightTo configure the Data collector: 1. Create a login and map roles 2. Configuring the Management Data Warehouse 3. Create collection sets, collection items----msdb data store sp_syscollector_create ... 4. Automatically configure the related job Specific steps: After creating the diagram: To configure Data collection: The refresh looks like this: The method created: Use msdb go declare @collectionsetid int --return val

SQL Server focuses on optimization of Stored Procedure performance, data compression, and page compression to improve IO performance (I ). Preface The SQL Server basic series is not over yet, And the last point is not written, and

Label:Original: Initial SQL Server performance issue (3/4): List blocked sessionsIn the initial SQL Server performance issue (2/4), we discussed the list of waiting resources or running session scripts. In this article we will loo

. SQL Server Execution Time: CPU time = 17188 milliseconds, time consuming = 17261 milliseconds. (1 rows affected) SQL Server Execution Time: CPU time = 0 milliseconds, time consuming = 0 milliseconds. */ Comparing 2000 and 2008 can be found 2008 CPU time is significantly higher than 2000, 2008 work

is not all on the second server:This shows: Distributed view can effectively solve the system performance problems, the large table different record range---on different servers, and then through the view of the table operation, effective balance server load trafficSplit up access to the boosted data:Placement of data:1. Principles of Data placement:1. Create filegroups on different powerless disks or raid

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

very deep, that is, more and more practical problems, have to have theoretical knowledge to support,But it is often theoretically said that the situation does not appear frequently or even if there is no attention, there is time to neglect some theoretical knowledge.For the problems encountered, if you really want to find out, still have some theoretical knowledge to do the groundwork. Many times, often after encountering problems, recalled once good seems to have seen this aspect of theoretica

The company database grows with time, the data is more and more, the query speed is also more and more slow. Into the database to see a bit, hundreds of thousands of of the data, the query is really time-consuming.To improve the query performance of SQL, we generally consider the index as the first consideration. In fact, in addition to the establishment of the index, when we are under the

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

Label:In the initial SQL Server performance issue (1/4), we learned how to quickly check the number of tasks that are running on the server instance and the number of IO waits. This is a lightweight script that does not put any pressure on the server, even if the

after you've processed historical data and report data, then add these new hardware, such as faster CPUs and hard drives, larger memory, and so on, but add new hardware postscript to modify your SQL Server configuration to accommodate these new hardware, such as opening/ 3G switch to use more memory. Scale out when scaling the up does isn't suffice or is cost-prohibitive. Use horizontal expansion When yo

Label:Original: SQL Server 2008 Performance Troubleshooting (i)--IntroductionRemark: I spent a lot of work time translation, no plagiarism, allow reprint, but please indicate the source. Because of the length, not a post all finished, but also not so fast all translated, so according to the chapter published. Due to my limited level, translation results must be p

,t.text from sys.dm_exec_query_stats as s -information about statements cross apply Sys.dm_ Exec_sql_text (S.sql_handle) as T ORDER by avgtotal Desc --Evaluation of database IO select * from Sys.dm_io_pending_io_requests --Request view of suspend IO select * from Sys.dm_io_ Virtual_file_stats ((Select db_id (' AdventureWorks2014 '), null) --function returns I/O statistics for data and log files- -The description file is suspended Select S.file_id,r.io_pending from sys.dm_io_pend

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

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