SQL Server Tracking Tempdb Size

Here is a quick Extended Events script I knocked up where I wanted to track Tempdb file size changes for both the data and log file. I wanted to know who caused the tempdb growth, when it was done, what the T-SQL was and what sizes were involved. Not exactly complicated but hopefully useful.

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SQL Server Tracking Suspect Pages

Did you know that SQL Server tracks suspect pages and puts the details into the msdb database in a table called suspect_pages? Well it does, but the question I want answering is what happens if the page within the suspect pages table is fixed? Does it automatically get removed/updated or do we as the administrators have to do anything manually?

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[Video] SQL Server Deadlocks

SQL Server Deadlocks – Also known as “The deadly Embrace” occurs when there are 2 processes and neither can advance and get the relevant lock it needs because the other process involved is preventing it from getting the resource it requires.

deadlocks

In this quick video clip I create a deadlock scenario and check how to get some deadlock information via system health extended events session.

Below is the T-SQL for querying the system health session. This was against a SQL Server 2014 install so you may need to change the file location.

SELECT top(1)
CONVERT(xml, event_data).value('(event[@name="xml_deadlock_report"]/@timestamp)[1]','datetime2') AS [TimeOfDeadlock],
CONVERT(xml, event_data).query('/event/data/value/child::*') AS [DeadlockGraph]
FROM sys.fn_xe_file_target_read_file('C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\Log\system_health*.xel', null,  null, null)
WHERE object_name = 'xml_deadlock_report'
ORDER BY [TimeOfDeadlock] DESC

SQL Server Rookie Mistakes

A quick elementary post which is my entry to this months’ T-SQL Tuesday entry hosted by a good friend SQLDoubleG http://www.sqldoubleg.com/2017/07/03/tsql2sday-92-lessons-learned-the-hard-way/.

TSQLTues

We are here to talk about mistakes we used to make. There is one mistake that I am going to discuss and is something that I used to do 10 years ago, obviously I do not do this anymore.

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Using SQL Server Diagnostics (Preview)

I was VERY excited when I read the following tweet (below) from Bob Ward regarding SQL Server Diagnostics capability. What is it you are asking? It is an extension to SQL Server Management Studio (SSMS) where it gives you the ability to Upload / Analyse dump files created by SQL Server.

bobsql.JPG

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WinDbg and SQL Server Fun

I have a SQL Server that is constantly producing “dump” files (with a MDMP File type), these are named SQLDumpxxxx (xxx = numerical value). They are located in the following directory: C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\Log\ – sound familiar?

Have a look at this screen shot – it’s messy!

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