A blog about real-life SQL Server Troubleshooting, providing solutions that actually work. By a SQL Server Enthusiast.
A severe error occurred on the current command
all the satellite assemblies required are loadable and fully signed
An error occurred while dropping availability group
An error occurred while obtaining or using the certificate for SSL
and it is not possible to create a self-signed certificate
Availability Group does not come up
Availability Group does not come up on one instance
Availability Group does not failover
Availability Group Not Synchronizing\Recovery Pending
awe in sql
because of error 9002
Caching in SQL
cannot be started because some of the database functionality is not available in the current edition of SQL Server
Cannot insert the value NULL into column 'servername'
Case sensitive collation
Check for previous errors
Error code 1642
Exit Code Returned: 11009
Failed mirror comes online after restart
failed to find installation media path due to datastore exception in FindSetupFolder()
Failed to launch local setup100.exe: 0x80070003
Failed to obtain the Windows Server Failover Clustering (WSFC) node handle (Error code 5042)
failed to run patch request for instance
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When using SSL, SQL Failover Cluster Instance fails to start with error 17182
I recently worked on an interesting issue with a SQL Server Failover Cluster Instance (FCI). We were trying to use an SSL certificate on the instance, and we followed these steps: Made sure the certificate was requested according to the requirements defined here . Loaded the certificate into the Personal...
22 Jul 2013
An interesting issue with SQL Server Script upgrade mode
Here's another common issue that I've seen quite a few people run into of late. When you run a patch against SQL Server, the patch installs successfully, but on restart, SQL goes into "script upgrade mode" and you're unable to connect to it. Upon looking at the errorlog, you see something like...
15 Apr 2013
An in-depth look at SQL Server Memory–Part 3
In part 1 and part 2 of the series, we talked about the memory architecture and the Procedure Cache respectively. In this third and final instalment of the SQL Server Memory series, I will look to focus on troubleshooting SQL Server Memory pressure issues. Before we start on the troubleshooting...
15 Mar 2013
An in-depth look at SQL Server Memory–Part 2
Before you read this, I would strongly recommend reading Part 1 first. The memory architecture evolved in a big way from SQL 2000 to 2005. Basically, in 2000, all we had was the procedure cache (used to cache compiled plans and execution plans, execution contexts, etc.) and the buffer pool. However,...
12 Feb 2013
An in-depth look at SQL Server Memory–Part 1
I know that memory management in SQL Server is one area that’s a bit of an enigma for a lot of people, and most of us only tend to know as much about memory as is related to our day-to-day activities. In this post(and others in this series), I shall seek to do a deep dive into SQL Server memory...
16 Dec 2012
SQL Server Cluster Failover Root Cause Analysis–the what, where and how
I know many of you get into situations where SQL Server fails over from one node of a cluster to the other, and you’re hard-pressed to find out why. In this post, I shall seek to answer quite a few questions about how to about conducting a post-mortem analysis for SQL Server cluster failover, aka Cluster...
3 Sep 2012
Migrating TFS from SQL Server Enterprise to Standard can cause problems due to compression
When migrating a Team Foundation Server from SQL Server Enterprise to Standard , you might run into this error: Restore Failed For Server ‘< Servername >’, (Microsoít.SqlServer.SmoExtended) Additional information: An exception occurred while executing a Transact-SQL statement or batch. (Microsoft...
3 Sep 2012
When DBMail started complaining about the servername being NULL
I recently came across an issue, where, for some reason, DBMail was not working. To be more specific, we were unable to create a profile for DBMail, let alone send emails. When trying to add the profile to the account, we were getting this error: TITLE: Configuring... ----------------------------...
22 Aug 2012
An interesting issue with SQL Replication and a rogue system spid
I recently came across this interesting issue with SQL Replication. We were trying to create a new publication, and the new publication wizard would just hang. Upon doing some investigation, we found that we were hitting the connect article mentioned here . However, the connect article mentions that...
9 Aug 2012
An in-depth look at Ghost Records in SQL Server
Ghost records are something that are a bit of an enigma for most folks working with SQL Server, and not just because of the name. Today, I’ll seek to explain the concept, as well as identify some troubleshooting techniques. The main reason behind introducing the concept of Ghost records was...
27 Jul 2012
SQL 2008/2008 R2/2012 setup disappears/fails when installing Setup Support files
I’m sure many of you would have seen this issue when running SQL 2008/2008 R2/2012 setup on a new server. The setup will proceed to install Setup support files, the window will disappear but, strangely enough, the next window never shows up. Here’s what you need to do: Click on start...
7 May 2012
SQL Server Resource database corruption–yes, it’s possible
It’s very rare that I run into an issue with the Resource database, and the one I ran into recently was rarer still. But before I get into the nitty-gritty of the issue, let us begin by outlining a few details about the resource database: The Resource database The resource database is a hidden...
9 Apr 2012
Access Violation dumps and metadata corruption
This is an issue that I had been busy working on these past few days. We were getting AV dumps on the DB, and when I looked at the stack, I found that SQL was calling a function to get the name of a column(given a table name), an index id and key id. This function call resulted in a an exception being...
26 Mar 2012
VSS backups might cause SQL to generate Non-Yielding Scheduler dumps if Backup verification is turned on
Found an interesting Non-Yielding scheduler recently. Opened the dump, and found function calls related to backup verification (such as validating the file name, verifying that the drive is part of the cluster group, etc.) at the top of the stack: Child-SP RetAddr Call Site 00000000`29cda478 000007fe...
20 Mar 2012
SQL Server Service Pack installation may fail if your instance name is a Windows reserved word
Okay, so I woke up one morning and decided that this was a good day to patch my SQL Server 2008 R2 instance (named LPT2) to Service Pack 1. So I just downloaded the Service Pack from the Microsoft website, ran it, and was going through the screens, whistling softly to myself, when….CRASH…...
15 Mar 2012
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