sql server performance tuning best practices

Technical Preparation database version is SQL Server2012, leveraging Microsoft's previous case library (Nor ... Read the full text posted @2015-02-01 21:41 fingertip Flow reading (+) | Comments (1) Edit sql Server Tuning Series Play chapter II (how to run with the aggregation joint hint (Hint) bootstrap statement) Su

Websphere? Application Server Performance Tuning Toolkit is an Eclipse-based smart tool designed to help users tune WebSphere application by using data collection, data analysis, and statistical inference techniques The performance of the Server. The goal is to help users fi

But configuring, optimizing the performance of IIS, so that the performance of the Web site access is not a simple thing, here I will explain how step-by-step optimization of your IIS server.Server-side environment, we take the Windows Server 2003 IIS6.0 as an example, the client environment is Mozilla Firefox 3.0, and the Yahoo YSlow extension is installed.YSlow

the importance of statistical information is self-evident. Interested children's shoes can be noticed in advance.The content of SQL Server performance tuning involves a wide range of topics, followed by an analysis in the following article.If you have any questions, you can leave a message or private messages, and loo

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

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

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

, 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)

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

, 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

necessary to identify a large number of space-occupying objects, such as: tables or indexes, and then by archiving historical data, the space is released first.2. The master data file (primary files) cannot be emptied. There are auxiliary data files that can be completely emptied.3. If you want to empty a filegroup, delete the objects (tables or indexes) assigned to the filegroup, or move them to another filegroup, DBCC Shrinkfile will not do the work for you.After the deleted data and objects

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

Microsoft SQL Server 2000 best practices for index fragmentation Source: Microsoft technetAuthor: Mike ruthruffTime: February 1, 2003 Summary as Microsoft SQL Server 2000 maintains indexes to reflectUp #100; ates to their underlying tables, these indexes can becomeFragmen

storage, but the benefits are largely negligible. Conclusion This article first of all, this article mainly describes the T-SQL statement tuning from the execution plan of the following, and introduced a few common simple operators, the next one will focus on some of our most commonly used operators and tuning techniques, including: Join operators, aggregation

called the procedure cache.The execution plan cache primarily contains the query plan and execution context.2. Execute the query plan (Generate execution plan-Generate query results), as described in the next article.Compiling and recompilingSQL Server has an efficient algorithm to find an existing execution plan for any particular SQL statement. SQL

. If you want to compress the size of the database, you must first confirm that the data file does not have the appropriate space to use. If the space is in use, it is necessary to identify a large number of space-occupying objects, such as: tables or indexes, and then by archiving historical data, the space is released first.2. The master data file (primary files) cannot be emptied. There are auxiliary data files that can be completely emptied.3. If you want to empty a filegroup, delete the obj

servers, the parameters of the last few lines can be a good way to reduce the number of time_wait sockets, but for Squid, the effect is not small. This parameter controls the maximum number of time_wait sockets, preventing squid servers from being dragged to death by a large number of time_wait sockets.Tuning is complete, then press to see the effect of it.# Netstat-n | awk '/^tcp/{++y[$NF]} END {for (w in y) Print W, Y[w]} ' established 968Issue 1: How to resolve the request after the e