This blog post describes how making the data flow buffers smaller might give a performance boost in some scenarios.

This is my contribution to T-SQL Tuesday #38: Standing Firm. I describe how I resolved an SSIS package performance issue.

This is day three of the SQL Advent 2012 series of blog posts. Today we are going to look at sargable queries. You might ask yourself, what is this weird term sargable. Sargable comes from searchable argument, sometimes also referred as Search ARGument…

I noticed Brent Ozar worked on a SQL book titled: Professional SQL Server 2008 Internals and Troubleshooting. This book is now available and I decided to ask Brent some questions about this book. This interview was conducted by email, enjoy. Denis: Is the book geared towards a beginner/intermediate level user or do you have to […]

Not too many moons ago when I started out with SQL Server I was convinced that there was a memory leak inside SQL Server. I ran it locally and the RAM usage just keep growing and growing until my computer was so slow that I had to restart SQL Server. This fixed things for a […]

sqtlrace is a stored procedure written by Lee Tudor (a.k.a Mr Tea.) The procedure takes an SQL batch as its first argument, sets up a trace filtered to include the current connection only, runs the batch, and summarises the trace information per statement in the batch. This can be a very handy tool to track […]

Take a look at this query. select * from ( select customer_id, ‘MTD’ as record_type, count(*), sum(…), avg(…) from payment_table where year(payment_dt) = year(getDate()) and month(payment_dt) = month(getDate()) group by customer_id) MTD_payments UNION ALL ( select customer_id, ‘YTD’ as record_type, count(*), sum(…), avg(…) from payment_table where where year(payment_dt) = year(getDate()) group by customer_id) YTD_payments UNION […]