SQL Server Articles


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Generate Log Files with a Trigger

As a DBA you try to supply data in a format that is familiar to the audience you’re presenting it to. Many times, you’ll present data in MS Excel to the accounting department, or an HTML report to a standard user. Your system and security administrators are no different; they are used to reading logs […]

High Call Volume SQL Server Applications on NUMA Systems

One of the most difficult database operations to scale-up on high-end server systems is the network call. In fact, without special precautions, a high call volume database application can have severe negative scaling on large systems. It is suspected that this problem is more pronounced on NUMA systems than basic SMP systems. A NUMA system […]

How Using GUIDs in SQL Server Affect Index Performance

Recently, I was asked my opinion on a database design schema our company developers were working on. When I heard they were using GUID’s (Global Unique Identifier) as PK’s (primary keys), my jaw about dropped. It turns out the reasoning behind the use of GUID’s for keys was completely legitimate, and actually is the reason […]

Finding Duplicate Indexes in Large SQL Server Databases

One important component of tuning a large, heavily used database, is to ensure that the tables are indexed optimally: enough indexing, but not too much indexing for the application you are running. There are rules of thumb about index tuning, but the entire issue is so complex that there’s no “silver bullet” solution that will […]

Are UDFs Harmful to SQL Server Performance?

Well, not really. But it is vitally important to understand when to use them and when to avoid them, as well as how best to construct them so as not to shoot your foot off. SQL Server 2000 introduced user-defined functions (UDFs), and they were immediately hailed as a great tool for encapsulating repetitive code, […]

How to Best Implement a SQL Server Performance Audit

The Final Word on How to Perform a SQL Server Performance Audit If you have gotten this far, you have done a lot of reading. In this final article on how to perform a SQL Server Audit, we will take a look at some best practices about how to best implement a SQL Server Performance […]

SQL Server Database Backup Performance with Quest (Imceda) LiteSpeed for SQL Server; 3 Terabytes in Under 1 Hour

Introduction For the last several weeks, I have been working with Imceda (now Quest Software) on improving the performance of LiteSpeed for SQL Server, particularly for high–end storage systems. This report represents my assessment of LiteSpeed performance characteristics. I am an independent consultant, so this report does not represent the views or claims of Quest. […]

SQL Server Query Performance Audit Checklist

SQL Server Query Performance Audit Checklist SQL Server Job Checklist Your Response Have you identified all long running queries? Have you prioritized the queries? Have you reviewed the execution plans of the above prioritized queries? Enter your results in the table above. Identifying Long Running Queries is First Step At this step in the SQL […]

SQL 2000 to SQL 2005: Where Have All the Old Features Gone?

As more DBAs across the planet begin using SQL 2005 Tools, but still manage SQL 2000 servers with them, I suspect there will be lots of muffled moaning as to where all the good old features have gone. Although Management Studio has some very nice long-awaited features, some of the good old stuff just isn’t […]

SQL Server XML Statistics and Execution Plans

One of SQL Server’s deficiencies when using XML queries is the lack of statistics capability in the XML driver. This is surprising because the ODBC API contains a function for providing statistics on remote data sources. SQL Server defaults to the fixed assumed row count values for remote servers, which is unreasonably high for XML […]
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