Formatting TSQL code
How do I format my TSQL code? Everybody has it’s own preferences on formatting SQL or TSQL code. I follow few very simple rules to achieve better readability, less bugs and – you wont’ believe – faster code execution! Code …
Speaking at conference Kulendayz 2015
4th of September I will hold a full-day preconference training about SQL Server 2016 performance tuning. It will be different, interesting, and hopefully funny. Real-life examples, way of thinking about the performance, and what are the ultimate limits of physical …
RCSI and LOB data – how tempdb version store is used?
Row Version Store We know RCSI (Read Committed Snapshot Isolation), as well as SI (Snapshot Isolation) use row versioning to store previous verions of rows in part of tempdb called “row version store”. If you are using default isolation level …
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Page Life Expectancy and 300 sec limit
People blogged about it, including excellent Jonathan’s post here (highly recommended to read), but I will give a little more insight here. Basically, Microsoft says if PLE is below 300 seconds, we should worry about memory pressure (an old recommendation …
Speaking at SQL Saturday Budapest #sqlsatbudapest
I just returned from Sql Saturday 376 in Budapest (#sqlsatbudapest). It was really amazing. The conference room I held presentation was huge and to my pleasant surprise – fully packed! I got a lot of positive comments there, so at …
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CommandTimeout – How to handle it properly – code example
Properly closing a connection to Sql Server in DotNet is more challenging than one might think. Classic code looks something like this MSDN example:
CommandTimeout – How to handle it properly?
ADO.Net Data Provider for SQL Server (System.Data.SqlClient namespace in System.Data.dll assembly) has two common classes we often use: SqlConnection and SqlCommand. SqlCommand class has CommandTimeout property (do not mix it with the ConnectionTimeout which stops long login process). But, do …
Speaking at SQL Saturday Vienna conference
I am pleased that I will speak at SQL Saturday conference in Vienna, 28th of February 2015 about how to solve the “recovery impossible” situation. It is quite advanced topic, but everyone who listens will be able to save the …
CHECKPOINT vs LAZY WRITER
Checkpoint and Lazy Writer are somewhat similar: they both write pages from buffer pool memory to the disk. So, what is the difference?
Transaction Log Backups – How long to keep them?
Introduction In this post I will give you a tip on how long it would be good to keep transaction logs. To understand why, basics of point-in-time recovery from backups are explained. If you are in a hurry: keep transaction …
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