You can rebuild and reorganize columnstore indexes the same as rowstore. The reasons you do this are different though. It's not about fragmentation, because of how columnstore indexes are defined,...

1. if one stored procedures includes many pieces of SQL Statements and when the stored procedure is called , then The Reads of RPC:Completed includes all the reads of...

One huge note, I wouldn't recommend anyone "upgrade" a server to 2014 here in 2021. There are three other versions of SQL Server after 2014. All of them offer mechanisms...

Actually, that article is a little off in what it's describing. It's not about fixed length versus not fixed length columns. It's about character (CHAR) versus variable character (VARCHAR). By...

Yeah, total agreement with Jo. It's just a question of probing the table on a regular basis to see what the status is. There is no such thing as a...

I used SQL Profiler to trace SQL scripts and got one sql statement with 53142 reads (as picture), but I executed that sql statement but found its...

I used SQL Profiler to trace SQL scripts and got one sql statement with 53142 reads (as picture), but I executed that sql statement but found its...

Thanks for reporting back what worked.

Yeah, compat level might help, but it could also burn things down. They're probably trying to avoid dealing the change to the cardinality estimation engine that occurred in 2014 by...

One possible explanation, assuming identical parameter values, is that a plan recompile occurred. The execution from Profiler was in one plan and the execution from SSMS was in a different...

The query doesn't have any kind of filtering through a WHERE clause? It's likely that running the query forces SQL SErver to move all the data in question through memory,...

Sounds like a parallelism deadlock. They're generally rare, but absolutely do happen. Usually, but not always, there are tuning opportunities that can make them go away; changes to the code,...

OK then.

My recent experience with "flat-earthers" taught me that it's almost useless trying to prove anything to true...

I am going to rewrite my query performance tuning book. It's a little out of date now. Pretty sure vNext is coming soon(ish). So yeah. I'm supposed to be working...

Hi all,

Fun enough, this thread 😉 Mixing state moves with unrelated thoughts about the need to document pgms code (how deep ? how far ?)

As a frog, I’ve learned...