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Suresh Raavi is a database professional, with a zest for SQL Server specializing in Administration and performance tuning. Presently, he is a Sr. SQL Server DBA at the Microsoft Products and Services IT SQL team, taking part in various challenging projects, focusing mainly on performance tuning, database development, high availability and database design. He is passionate about database technologies and "data" in general. He has earned the MCITP Database Administrator 2008, and holds a Master of Science degree in Engineering. He provides insights from the field on his blog at His hobbies includes Running and Travelling. You can follow him on Twitter @SqlServerZest

SQL Server – Configuring custom Load Balancing in SQL Server 2012 and 2014 using Read-Only Routing

Starting with SQL Server 2012, AlwaysOn Availability Groups provided group level high availability for any number of databases for multiple secondaries known as ‘replicas’. The secondary replicas allow direct read-only querying or can enforce connections that specify ‘ReadOnly’ as their Application Intent using the new feature called Read-Only routing which…

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3 comments, 1,089 reads

Posted in - SQL in simple style on 1 October 2015

SQL Server – Dynamically Generate Scripts for Configuring Read-Only Routing URLs and Lists

Read-only routing refers to the ability of SQL Server to route incoming read-intent connection requests, which are directed to an availability group listener, to an available readable secondary replica. I find this little script very useful when I want to automate and and same time while limiting the human input…

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1 comments, 207 reads

Posted in - SQL in simple style on 1 October 2015

SQL Server – Script to generate Read-Only Routing URLs

If you are familiar with the new feature Read-Only Routing introduced in SQL Server 2012 with AlwaysOn then you should keep this script handy to generate URLs to be used in Read-Only Routing configuration instead of typing down yourself to limit any errors. Connect to each replica in your AlwaysOn…

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1 comments, 192 reads

Posted in - SQL in simple style on 1 October 2015

SQL Server – New Database Backup Encryption with SQL Server 2014

With the release of Microsoft SQL Server 2014, we have the first version of SQL Server that supports encrypting database backups directly from the database engine without any third party software being installed on the SQL Server. Preparing the Instance for Encrypted Backups Before you can have the SQL Server…

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0 comments, 282 reads

Posted in - SQL in simple style on 21 July 2015

SQL Server – Capture Execution Plan of a Currently Running Query/Process SPID

DBAs most often face scenarios where they need to capture graphical execution plan of a query currently running on a live production instance because of multiple reasons like: why a particular SPID is causing blocking why is my query running slow why isn’t the index getting used which operator is…

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0 comments, 499 reads

Posted in - SQL in simple style on 5 June 2015

SQL Server – How to Calculate Length and Size of any field in a SQL Table

Recently I came across a situation where queries are loading extremely slow from a table. After careful analysis we found the root cause being, a column with ntext datatype was getting inserted with huge amounts of text content/data. In our case DATALENGTH T-SQL function came real handy to know the…

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2 comments, 357 reads

Posted in - SQL in simple style on 4 June 2015

SQL Server – Changing Ownership for All the User Databases to “sa” Account

Most people prefer to have “sa”  account as the database owner, primary reason being sa login cannot be removed/deleted unlike any user account or service account and so the databases will never end-up in an orphaned stage. I came-up with the below method to change the ownership to sa on…

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0 comments, 117 reads

Posted in - SQL in simple style on 5 May 2015

SQL Server – Endpoint Authentication Error in AlwaysOn Availability Group Setup

According to MSDN: If the SQL Server service is running as a built-in account, such as Local System, Local Service, or Network Service, or a nondomain account, you must use certificates for endpoint authentication, and the Add New Replica wizard will be unable to create a database mirroring endpoint on…

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0 comments, 373 reads

Posted in - SQL in simple style on 6 February 2015

SQL Server – Ports used by Database Engine and other SQL Features

Most of us know the default port for SQL Server is 1433, but there are various ports being used by SQL Server for other database services and SQL features. In the below table I tried to list the ports that are frequently used by the Database Engine Item Port Default…

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0 comments, 105 reads

Posted in - SQL in simple style on 7 December 2014

SQL Server – Failed to bring availability group ‘[availability group name]’ online

I have been noticing one very common error that occurs while trying to failover an Availability Group in SQL Server 2012 AlwaysON setup. The Availability Group fails to come online during a fail over process. Here is the snippet of the error message. Failed to bring availability group ‘availability_group‘ online.…

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3 comments, 457 reads

Posted in - SQL in simple style on 28 October 2014

SQL Server – Aborted Online Index Operation & Observed Elevated Values for PWAIT_MD_RELATION_CACHE and MD_LAZYCACHE_RWLOCK Wait Types

Last week on one of our production servers (version 2011.110.3373.0), we’ve encountered a strange issue which is relatively new (only applicable for SQL Server 2012 and 2014 versions). Based on the symptoms observed and doing a quick Bing search found we encountered a product bug! I observed multiple SPIDs, around…

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0 comments, 322 reads

Posted in - SQL in simple style on 12 August 2014

SQL Server – Script to Identify and Update Database Auto-Growth Setting

An auto-growth event is the process by which the SQL Server engine expands the size of a database file when it runs out of space. The amount by which a database file should grow is determined by the value that is set in the SQL configuration. While every organization has…

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10 comments, 612 reads

Posted in - SQL in simple style on 25 June 2014

SQL Server – Script to Configure TempDB Files per Number of Logical Processors

In order to reduce Tempdb contention one of  the best practices is to maintain multiple sized Tempdb data files, matching the number of processors and up to a maximum of 8. In this post I will show you T-SQL script to identify current Tempdb configuration and number of logical processors…

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1 comments, 661 reads

Posted in - SQL in simple style on 24 June 2014

SQL Server – How To Find SQL Virtual Name From Host Name in SQL Failover Clustering Using PowerShell

Often times it is required to find out the SQL name from the host names in a clustered environment so you can use it to connect through SSMS. There are many ways you can achieve this, however I am showing 2 methods here. Method 1 is the most common way…

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0 comments, 602 reads

Posted in - SQL in simple style on 14 April 2014

SQL Server – Using Tools to Analyze Query Performance

Here is the session I gave for the techies at Microsoft about in-built tools available in SQL Server to analyze a query performance. This is a bit lengthy, but covers ALL out of the box tools in SQL Server to get query metrics.

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0 comments, 556 reads

Posted in - SQL in simple style on 11 February 2014

SQL Server – Deploying Multiple SSIS Packages into SQL Server Using Command Prompt Utility – DTUTIL

Though there are several ways for importing SSIS packages into SQL Server either by creating a stored procedure or using a SSIS package itself, I find this simple code of line much easier and handy to work with.  It utilizes the “dtutil.exe” application which is installed by default with SQL…

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4 comments, 513 reads

Posted in - SQL in simple style on 4 November 2013

SQL Server – Understanding Allocation Units – In Row Data, LOB Data & Row Overflow Data

Before we get started on this topic, here is a quick SQL Server 2000, there used to be hard limit on the data that can be stored in a single row, which is 8,060 bytes. So, if the data exceeds this limit, the update or insert operation would fail!…

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4 comments, 624 reads

Posted in - SQL in simple style on 14 October 2013

SQL Server – Restoring a TDE Encrypted Database to a Different Server

In this article I will show you how to restore a database that is encrypted with Transparent Data Encryption (TDE) on to a different server. Let’s use the same database ‘TDE_Test’ that we have created in the previous post HERE Restoring a database to a different SQL Instance is usually…

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4 comments, 609 reads

Posted in - SQL in simple style on 3 October 2013

SQL Server –Encrypting and Securing Native Backups Using Transparent Data Encryption (TDE)

Being part of the database engineering team, we were given a task to setup disaster recovery program for some of our SQL Servers hosting critical applications. After a few discussions, we have planned to make use of log shipping to sync data between the two data centers. This requires us…

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3 comments, 507 reads

Posted in - SQL in simple style on 3 October 2013

SQL Server – How to Copy or Export an SSIS Package Using Command Prompt Utility – DTUTIL

The command prompt utility dtutil can be very handy when we want to quickly export an SSIS package from either file system to msdb or vice-versa. For a quick demo, I created a package called “ProductPrice” uder the file system C:\packages, as shown in the screenshot below Also, I created…

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3 comments, 1,071 reads

Posted in - SQL in simple style on 2 October 2013

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