sql server performance monitor counters

Recently due to work needs, I hope that a more comprehensive summary of SQL Server database performance optimization related considerations, search on the internet, found a lot of articles, and some are listed hundreds, but look at the discovery, there are many specious or outdated (may be on the SQL SERVER6.5 the prev

Because the company's project encountered database operation performance problems after going online and running, it needs not to be changedCodeIn this case, the database performance is optimized, so I found the relevant information and wrote down my experience.1. most database performance bottlenecks are concentrated on query statements. for

SQL Server Performance Tuning entry (graphic version) Step 1: capture sample data during business peaks(About 2 hours ). The tool used is the profiler that comes with sqlserver, also known as the event probe. For example, after entering, click the button on the leftmost side to create a new trail: DBO permission is required for logon, therefore, you can log on wi

To maximize the performance of SQL Server, you must first identify several aspects. When these several aspects are optimized, the whole system performance can be improved to the greatest extent. You can then analyze these several aspects. Otherwise, you may not be able to do it. Experience has shown that the

'. Scan count 1, logical read 1 times, physical read 0 times, read 0 times, LOB logic read 0 times, lob physical read 0 times, lob read 0 times. (6 rows affected) (1 rows affected) SQL Server Execution Time: CPU time = 0 milliseconds, elapsed time = 528 milliseconds. (500 rows affected) Table ' worktable '. Scan count 0, logical read 0 times, physical read 0 times, read 0 times, LOB logic read 0 times, lob

) include (Gender,createtime) You can see that we have modified the index after using include Gender,createtime, the index Ix_username has reached the full coverage of all the columns of the datasheet users, at which point there is no doubt that Query 2, query 3 does not appear bookmark lookup, The bookmark lookup for query 4 also disappears. At this point the index ix_username structure is as follows Index Ix_username has reached the full coverage of the users table, for our qu

;, ②. Multiple columns are frequently accessed at the same time, and each column contains duplicate values. You can consider creating a composite index; ③ Composite indexes should try to overwrite key queries, and the leading column must be the most frequently used column. 2. is null and IS NOT NULL Null cannot be used as an index. Any column containing null values will not be included in the index. Even if there are multiple columns in the index, as long as one of these columns contains null, t

the mass query as little as possible with the format conversion. 5, when in SQL SERVER 2000 If the stored procedure has only one parameter and is of the output type, the parameter must be given an initial value when the stored procedure is invoked, otherwise a call error will occur. 6. Order BY and Gropu by Using the order by and group by phrases, any index contributes to the

A few SQL Server paging stored procedure writing and performance comparisonsStored procedure 5 Kinds of pagination, the following code is from the forgotten when from someone else that CTRL + C, so just as a collection, hope the author see don't Spray me.------Create a Database tutorial data_test-----Create DATABASE Data_testGoUse Data_testGoCREATE TABLE Tb_testt

SQL Server Performance Optimization (1) Database Design Can you refer to the recent forum on the emergence of an excellent post http://topic.csdn.net/u/20100415/10/a377d835-acbd-4815-8bcb-b367f88ac8b5.html? 92227Database design includes physical design and logical design:Physical DesignYou can use the raid hardware architecture.To put it simply, the usage policy