sql server performance tuning books

VMware ESX Server is the most popular virtual software PRODUCT on the Intel platform on the current server market. Compared to other virtual software products, the greatest advantage of ESX is that it can greatly reduce the resources occupied by the host system. The ESX server kernel runs directly above the hardware, and the system stability and

article has been a bit long ... Let's get here first.About tuning the content is too broad, we put in the future space to introduce, interested can advance attention.Reference documents Microsoft Books Online Read page Refer to the book SQL. server.2005. Technical Insider "series If you have any ques

. server.2005. Technical Insider "series ConclusionThis article first to this bar, short, easy to understand, this article mainly introduces the query plan of the joint operators, the next we analyze SQL Server parallel operations, in multicore hyper-threading gathered today, see SQL How

. Reference documents Microsoft Books Online logical operators and physical operator references Refer to the book SQL. server.2005. Technical Insider "series Conclusion This article is here first, this article mainly describes the T-SQL statement tuning

statements first, converting lowercase letters to uppercase and then executing (20) Use the connector "+" connection string sparingly in Java code! (21) Avoid using not on indexed columns usually (22) Avoid using calculations on indexed columns (23) Replace > with >= (24) Replace or with union (for indexed columns) (25) Replace or with in (26) Avoid using is null and is not NULL on an indexed column (27) Always use the first column of an index (28) Replace union with

, converting lowercase letters to uppercase and then executing (20) Use the connector "+" connection string sparingly in Java code! (21) Avoid using not on indexed columns usually (22) Avoid using calculations on indexed columns (23) Replace > with >= (24) Replace or with union (for indexed columns) (25) Replace or with in (26) Avoid using is null and is not NULL on an indexed column (27) Always use the first column of an index (28) Replace union with Union-all (if possible)

The following articles mainly describe the ultimate SQL Performance tuning Technology of DB2, including the impact of pointers on the Performance of DB2 databases, DB2 performance tuning technology and a detailed description of mo

operations:Look at a slightly worse notation:Select O.orderid from Orders owhere EXISTS ( select C.customerid from Customers c WHERE c.city=n' londom' and c.customerid=o.customerid) In the above statement, we are writing about the related subquery operations, but the actual sub-queries formed in the execution plan, thus avoiding the performance cost associated with the subquery.In fact, the above statement, the relatively good wording is as

are crossed, then a query can be made using one. Let's see a statement. SELECT OrderID from ORDERS '1998-01-01' 1998-03-05 ' Here we use the predicate connection method for and, so in the actual execution, although both columns have nonclustered indexes, the theory can be used, but we just choose an optimal index to find, and another directly using bookmarks to find out. Save the previous introduction of the various Gods horse sort to go heavy .... Flow polymerization de-weight .... And s

, etc.Linux features are rich, powerful, and flexible. You can use it to complete various tasks. In this article, we will discuss some techniques to improve the performance of Linux servers.1. Adjust the Linux kernel elevator Algorithm for disk I/OAfter selecting a file system, some kernel and mount options may affect its performance. One of the kernel settings is the elevator algorithm. by adjusting the el

procedure is the only user who can use the procedure. Permission to perform a local temporary procedure cannot be granted to another user. If you create a global temporary procedure, all users can access the procedure, and permissions cannot be explicitly revoked. Only users with explicit create PROCEDURE permissions in the tempdb database can explicitly create temporary procedures in the database (without the use of a number character name). You can grant or revoke permissions in these procedu

rich, powerful, and flexible, and you can do a variety of tasks with it, and in this article we'll discuss some tips for improving the performance of Linux servers.1. Tuning the Linux kernel elevator algorithm for disk I/OAfter selecting the file system, there are some kernel and mount options that may affect its performance, one of which is the elevator algorit

best to monitor the users who have no permission to delete the wrong table. Of course, do not use an account unless necessary !) You can use EXECsp_configure'defaulttraceenabled',0; RECONFIGUREWITHOVERRIDE; To disable the default trail. Black box tracking helps us diagnose database failures. We should also find it when searching sp_create_trace on MSDN. Then we can create a similar stored procedure to quickly create a black box tracking, to help us diagnose some exceptions! CREA

executed using the index ....First the nonclustered index contains the column: [Orderid],[customerid]The value we want to get is filtered according to Shippostalcode, so to get the result you have to do a single scan of the nonclustered index (index Scan), which can also, after all, nonclustered indexes are ordered, but in order to filter, you must introduce a bookmark lookup (Key Lookup) To filter, we know that the bookmark lookup is random io, the consumption is huge, so this filter is like i

. server.2005. Technical Insider "series Conclusion This article first to this bar, short, easy to understand, this article mainly introduces the query plan of the joint operators, the next we analyze SQL Server parallel operations, in multicore hyper-threading gathered today, see SQL How