SQL Server General DBA

A Primer on Log Shrinking and Truncation in SQL Server

In the event that a transaction log grows to an out-of-control size, shrinking it can be the only solution – but don’t rush to do this until you are aware of the consequences. Shrinking the log could ‘break the log chain’ – rendering the existing transaction log backups useless. When this happens, the most recent […]

How to Optimize SQL Server Query Plans – The Devil is in the Detail

When dealing with the performance database any detail should can never be neglected, because even the smallest thing can turn out to be a great opportunity for query optimization. Generally, one needs a significant amount of experience to detect that kind of details easily. But what shall the rest do till they gain the required […]

Extended Events in SQL Server 2012

Extended Events were introduced in SQL Server 2008 as a light-weight monitoring mechanism. Most DBAs typically use SQL Profiler to monitor and analyse SQL Server events. However, SQL Profiler is not a lightweight tool and consumes too many resources for use in a production environment. In SQL Server 2008, Extended Events can only be configured […]

Restoring a SQL Server Database – A Practical Example

Performing a Database Restore is a part of a DBA’s daily life. A DBA may need to perform a Restore due to various reasons such as recovery, refreshing a database for testing purpose etc. Many times it can be difficult to perform a Restore due to corrupted media, low disk space on the server and […]

A Journey from OLTP to OLAP- Part 2

In my last  article we saw the basics of the data warehousing in which we saw looked at how OLAP and OLTP technologies differ in their functionalities, what were the models being used to develop the data warehouse and what were the schemas under consideration for designing the data warehouse. In this article I will […]

Replicating A Volume Of Large Data via Transactional Replication

During weekend maintainence, members of the support team executed an UPDATE statement against the database on the OLTP Server. This database was a part of Transactional Replication and the database on the subscriber was used by the SSRS reports. The UPDATE statement impacted around 3500000 records. Once the UPDATE statement was executed, the Replication procedure […]

Transactional Replication – Violation of Primary Key Constraint

Recently, I encountered a case where the Transactional Replication between our Production OLTP server named XYZ and Reporting database server named PQR went out of sync. Both the servers were located in the same Data Centre in the USA. The Reporting database was used by the users in Canada for fetching the data from the […]

Understanding SQL Server Query Optimization – Part 1

In the first of this four part series I will give an overview of the tools and techniques of query optimization in SQL Server Most of the activity of the database server is related to queries. Because of this, query optimization is often a major concern. SQL Server tries to optimize query performance itself, but […]

Controlling Growth of a msdb Database

I recently encountered a situation where the drive hosting Sharepoint Databases in a Staging environment ran out of space. I logged onto the server and found that the msdb database has itself occupied 38 GB of the total disk space. Msdb database generally contain maintenance information for the database such as backups, log shipping and […]

Guide to SQL Server Table Indexes – Part 4

In the first part of this article series, you learned about the basics of SQL Server database table’s indexes, the difference between the clustered and non-clustered indexes, and how the leaf nodes, non-leaf nodes, and heaps associated with data storage. In the second and third part, you learned about the different types of indexes available […]
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