Category: Database Administration

Game changer settings # MAXDOP and Cost threshold for parallelism

I got a performance tuning assignment for an esteemed customer in the Financial Services domain. I went through the wait stats of SQL Server using the built-in SQL Server Report, called Performance Dashboard. I found CPU – Parallelism referred to as CXPACKET was leading the list, followed by Buffer IO, Lock, and Latch. Parallelism in SQL Server refers to two settings – MAXDOP and Cost threshold … Continue reading Game changer settings # MAXDOP and Cost threshold for parallelism

Estimating the storage savings by removing columns with NULL value across the table or marking them as SPARSE

In the previous article Find columns with NULL values across the table we discussed that storage space can be saved by removing columns with NULL value across the table or marking them as SPARSE. We also learnt about the query to find all such columns across the tables of a database. In this article we'll … Continue reading Estimating the storage savings by removing columns with NULL value across the table or marking them as SPARSE