SQL Server Performance Tuning

SQL Server Join Nastiness Tamed: Finding Joy In The INNER LOOP

Microsoft SQL Server sometimes uses hash and merge joins when querying large tables when uncomplicated nested loop joins would result in better performance and less server impact. In many such cases, query times go from many milliseconds to many seconds because hash table joins require that large amounts of data be processed and temporarily stored, […]

How Updates are Performed in SQL Server 6.5

SQL Server 6.5 can use two different methods to update records, depending on the circumstances. They include: Direct Update Deferred Update Each method affects performance in a different way, as we shall see in this article.A Direct Update includes three different methods of modification: In-place update On-page delete/insert Full delete/insert Think of these above three […]

Best SQL Server Performance Tuning Tips

This website offers hundreds of different ways to tune SQL Server for optimum performance. But as you read over the many tips, you might be asking yourself, which tips offer the most performance gains for the effort expended. As you can imagine, it is not always easy to know which tips might help boost your […]

Undocumented SQL Server 2000 System Tables

In this article, I want to tell you about the undocumented system tables shipped with SQL Server 2000. These tables are used by some system stored procedures and most are stored in the master database (only the sysfiles1, sysproperties and sysfulltextnotify system tables are stored in each database). syscursorcolumnsContains the list of the a cursor’s […]

Interview with Robin Dewson, Author of Beginning SQL Server 2000 Programming

Read the SQL-Server-Performance.Com Book Review Robin Dewson is the author of the Wrox Press book, Beginning SQL Server 2000 Programming, and the co-writer of several other SQL Server-related books, including Professional Access 2000 Programming, Professional SQL Server Development with Access 2000, Professional SQL Server DTS, and Professional SQL Server 2000 Programming. He is a SQL […]

Use the Correct ASP (ADO) Syntax to Enable Connection Pooling for Best SQL Server Performance

There is much confusion about how to actually implement connection pooling in VB/VBScript code. In this article I have actually tested various ASP syntax variations and verified the results when using connection pooling.To preface – here are some highlights and some recent findings: Setting connections to “Nothing” in ASP does NOT affect connection pooling – […]

Using AWE Memory in SQL Server 2000

If you are using SQL Server 2000 Standard Edition under Windows NT 4.0 or Windows 2000 (any version), or are running SQL Server 2000 Enterprise Edition under Windows NT 4.0 or Windows 2000 Server, or if your server has 4GB or less of RAM, the “awe enabled” option should always be left to the default […]

Microsoft SQL Server & Solid State Accelerators

Solid State Accelerators make it possible for you to give your peripheral storage the speed of memory. Essentially, a Solid State Accelerator is Solid State memory technology with an attitude, which emulates a conventional disk drive or array. It includes a built-in UPS backup system that allows the data to be copied to an available […]

The Ultimate SQL Server

If you are like most DBAs, you probably don’t get a lot of opportunity to work on really big SQL Server machines. I mean the kind that can crunch a 10 million-row table in seconds without breaking into a sweat. The kind of server that can take requests from a 1,000 clients all at the […]

Using Index Intersection to Boost SQL Server Performance

First introduced in SQL Server 7.0, and of course available with SQL Server 2000, Index Intersection gives you new options for creating indexes on tables in order to maximize performance.To demonstrate how Index Intersection works, I am going to use the “authors” table from the Pubs database to first explain how the current indexes on […]
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