How To Troubleshoot SQL Crash Dump Analysis

How To Troubleshoot SQL Crash Dump Analysis

If you have analyzed the SQL crash dump on your PC, this guide will help you fix it.

A package dump is a pretty file that doesn’t end with “.mdmp” SQL when Server encounters a run condition for which it doesn’t have a built-in task error that it can handle.

How do I open a SQL crash dump file?

The first thing you want to do is view the stack dump.Follow this link to download and install Debugging Software for Windows.Open WinDbg (in my case it was in C:Program FilesWindows, go to Kits10debuggersd), in File – Open Crash Dump.

As a sql-production-dba server, you may need to sell it with a dump stack. The plonk stack is the file that is actually written to disk with the new .mdmp extension when the SQL server encounters a fully met condition that contains no builtin errors. It contains the call stacks and memory information of the threads that were executing when this situation occurred, and in such a way that it can be used for troubleshooting after a while.

The reasons why these types of errors occur vary greatly and can range from CPU scheduling issues, RAM chip issues, very high I/O latency, connected server drivers, etc. In the worst case, which is the most fatal Importantly, stack dumps can cause system instability and trigger a failover cluster or restart of SQL Server solutions. Microsoft p>

Because they own the SQL Server source code, they have more power to solve thesesituations. However, that doesn’t mean that we can’t do some investigations ourselves, and in many cases many find a clear idea of ​​what’s really causing the problem. So, understanding how to perform analysis, this one is probably necessary to find quick workarounds when contacting Microsoft Support to find the real root cause and final solution.

Now let’s get down to business and action, let’s get started!

  • The first thing you often need to do is dump the stack for analysis. If it is already on your system, you can find the .about mdmp files in the directory where the logs are undoubtedly SQL ERRORLOG.< /li>
  • Follow this link to download and install debugging tools for Windows. We are interested in WinDbg. There are different installation tools for your system. Personally, I downloaded the Windows SDK ISO and then just “Selected debugging tools selected for Windows” when installing.
  • Open WinDbg (in my case it was indeed in FilesWindows c:program Kits10Debuggersd), select – File Open Crash Dump.
  • The tool has now recognizedthat the entire file is a stack dump, contains information that may be useful.

    .sympath srv*c:debugsymbols*https://msdl.microsoft.com/download/symbols;

    What is crash dump file in SQL Server?

    SQL Server crashes – an audio/video error, claims, or other undetected software error. Again, the file is a core dump and its size and contents depend on the issue you are experiencing. These are supported for Watson error reporting and DBCC CHECKDB has also found corruption in a specific database.

    This agreement and package includes the symbol path for the program at C:debugsymbols and the direct information technology for downloading it from the Microsoft custom symbol URL.

    To download Now tokens, type:

    .new will start /f

    The loader loads these files and can cause inconvenience if it cannot find icons for certain DLLs. ok, it turned out that symbols can be found in sql server.this

    It’s a good idea to save this configuration to the workspace at this stage so you don’t have to refer to it every time. To do this, simply navigate to File – Save Workspace and name it a. You can then open the Windbg workspace open, then crash, add and you don’t need to load the icons.

    Back to the command video window, we can verify that the symbols for the sql server can be executed:

    analyze sql crash dump

    lmvm from sqlservr

    In the output part, we can see that our actual tokens found a match with the module mentioned in the dump In this case, someone’s SQL Server executable, sqlservr.exe.

    How do you analyze a crash dump?

    open launch.Find WinDbg, right click on the top result and select the main option “Run as administrator”.Click on this file menu.Click Start Debugging.Choose our own open file sump option.Select a specific dump file from Location folders or Per %SystemRoot%Minidump Example.Click on the specific open button.

    It also contains the exact version information for SQL Server for. For example, the monitor snapshot above identifies version 11.0.6594, which is Server sql Service 2012 Pack 3 Mass Update #4. You can of course always get the current information yourself about the server, but if the file is available to all buyers, then this is an alternative
    way to find one around it. It is important to know the exact version information as the dump may have been generated by an error due to the specific version.