I have been writing about how some of the interesting enhancements made with SQL Server 2016 SP1 have caught my attention. This one is a killer feature that can be of great value when you are trying to do testing. Having said that, I also want to call out that this feature has been added with SQL Server 2014 SP2 too. When you get into performance problems related to the query optimizer, then this capability will be of great advantage. In this blog post we will learn about Generate Statistics and Schema Only Copy of the Database.
Recently in one of the webcast, while I was presenting about statistics and performance tuning, I was asked by one of the attendees that if there is anyway to find out all the outdated statistics based on the dates from the server. This is indeed a very interesting question and I will be happy to explain you here.
[Note from Pinal]: This is a 117th episode of Notes from the Field series. Everytime I go to do performance tuning consultancy, one thing annoys me and makes me angry. The usage of NOLOCK hint. I think without any argument, this is one of the most abused query hint in the SQL Server universe. Lots of people treat NOLOCK as a silver bullet of performance tuning and that is unfortunate. There is a special purpose of how NOLOCK should be used and what is the end goal of it.
In this episode of the Notes from the Field series database expert Stuart Ainsworth explains about NOLOCK and its best practices. Trust me, you do not want to overuse NOLOCK hint as it can just impact your database integrity negatively.
[Note from Pinal]: This is a 98th episode of Notes from the Field series. Maintenance of the database is a very critical activity and I have always seen DBA taking it very seriously. There is a only one problem – there is no single solution or guidance for how to maintain the database. Everybody has their own opinion and way to do different tasks. System maintenance is very straight forward task but I have seen quite often experts even getting confused with the same. Many only focus on index maintenance, statistics maintenance and a few other tasks are common, but understanding the real philosophy of this task is something beyond indexes. When I asked my good friend Stuart about system maintenance, he came up with very interesting guidelines for system maintenance.