Continuation from the previous 34 parts, starting from https://www.nikoport.com/2014/07/20/clustered-columnstore-indexes-part-34-deleted-segments-elimination/ This blog post is about controlling some of the Columnstore Indexes behaviours in less obvious ways – by using Trace Flags & Query Optimiser Rules. I will be looking into updating…
Continuation from the previous 33 parts, starting from https://www.nikoport.com/2013/07/05/clustered-columnstore-indexes-part-1-intro/ Segment Elimination for Deleted Row Groups After some very interesting and inspiring conversations during SQLBits, I came to an idea of testing a Segment Elimination while working with a fully deleted…
Continuation from the previous 32 parts, starting from https://www.nikoport.com/2013/07/05/clustered-columnstore-indexes-part-1-intro/ We all love and use Columnstore Segments, but we all kind of scared of the open Delta-Stores (yes there can be more than 1). Why would that be? – because they…
Continuation from the previous 31 parts, starting from https://www.nikoport.com/2013/07/05/clustered-columnstore-indexes-part-1-intro/ The Columnstore Row Group Size Question: What is better for SQL Server performance: to have a big Row Groups (1.045.678 rows) or to have them as small as possible (100.000 rows)…
Continuation from the previous 30 parts, starting from https://www.nikoport.com/2013/07/05/clustered-columnstore-indexes-part-1-intro/ This blog post is focusing on one of the most important real world issues – Memory Pressure. While testing on your own Computer or on some development server in a controlled…