Why does removing a RID by creating a clustered index lose parallelism and slow down execution by 2X
If I remove a RID lookup by replacing 2 non-clustered indices (non unique) with 2 identical clustered indicies (non-unique) where there weren't any before, why does this query slow down by a factor ...
I've read different ideas to set FILLFACTOR and then monitor fragmentation over time (#1: 5 Things About Fillfactor, #2: Database Maintenance Best Practices Part II – Setting FILLFACTOR). Instead of ...
Howto improve performance for these queries, why is my indexed view making it worse for most of them and how can I change that?
for the record, this is a rewrite of the following question (you do not have to read that because I include all important data here) Howto improve performance for queries against table without primary ...