SQL Server General DBA

Physical Join Operators in SQL Server – Hash Operator

In second part of this series on physical join operators we looked at the Merge Operator. In the final part of the series we turn our attention to the Hash operator. For this article series I am using an analogy of two sets of standard playing cards. One set with a blue back and another […]

Physical Join Operators in SQL Server – Merge Operator

In Part I of this series on physical join operators we looked at Nested Loops. We now turn our attention to the Merge operator. For this article series I am using an analogy of two sets of standard playing cards. One set with a blue back and another with a red back that need to […]

Recovering a SQL Server Database from Suspect Mode

A couple of days back at I got a call from my support team informing me that one of our database located on the Production Server went into Suspect Mode. The version used was SQL Server 2005 Service Pack 3. Being a Production Database server, it was a Priority 1 incident and the expected time […]

SQL Server Hardware Optimization

An important concern in optimizing the hardware platform is hardware components that restrict performance, known as bottlenecks. Quite often, the problem isn’t correcting performance bottlenecks as much as it is identifying them in the first place. Start with obtaining a performance baseline. You monitor the server over time so that you can determine Server average […]

Implementing Database Settings Using Policy Based Management

Introduction Database Administrators have always had a tough time to ensuring that all the SQL Servers administered by them are configured according to the policies and standards of organization. Using SQL Server’s  Policy Based Management feature DBAs can now manage one or more instances of SQL Server 2008 and check for policy compliance issues. In […]

Physical Join Operators in SQL Server – Nested Loops

SQL Server implements three different physical operators to perform joins. In this article series we will examine  how each  operators works, its advantages and challenges. We will try to understand the logic behind the optimizer’s decisions on which operator to use for various joins using (semi) real life examples and how to avoid common pitfalls. […]

Tuning your SQL Query – Generating a Proper Execution Plan.

Recently one of my developers came to and complained of slow performance on a particular query. During the investigation I noticed that the primary cause was the poor query execution plan. In this article, I will discuss the approach which I used to improve the execution plan. For demonstration purpose, I will be creating a […]

12 Essential Steps After Installing SQL Server

Rolling out SQL Servers is a key task for DBAs.  While for some DBAs this can be a frequent exercise, others will have to face it one time or other throughout their career in an organisation. Successfully planning an installation requires a fair bit of knowledge about SQL Server and a basic understanding of the […]

Monitoring Transactional Replication – The Distribution Queue

Note : The scripts for this article can be downloaded here. Monitoring the distribution queue is an important link in the chain of transactions delivery over a replicated topology. A chain that includes the log reader agent scanning the published database’s transaction log for commands to be moved to the distribution database from which a […]

TroubleShooting SQL Server Memory Consumption

Recently on one of our staging servers had a memory consumption issue and even 32 GB of RAM was looking insufficient and application performance was being impaired. Initially I thought the cause would be poorly designed queries, but after a thorough investigation this turned out not to be the case. I noticed that whenever the […]

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