Here is the question asked in my yesterday’s Comprehensive Database Performance Health Check about rows sampled from sys.dm_db_stats_properties.
SQL SERVER – Statistics Modification Counter – sys.dm_db_stats_properties
The Statistics Modification Counter tracks changes relevant to each statistics object. I inspect it alongside the affected query and estimates.
Can a Database Have Multiple Files with Extension MDF? – Interview Question of the Week #279
Question: Can a Database Have Multiple Files with Extension MDF?
Answer: Yes. It is possible to have multiple files with extension MDF.
Memory Used by Each Table in the SQL Server Buffer Pool
Memory used by each table is the number of its pages in the buffer pool times 8 KB. This post adds them up with sys.dm_os_buffer_descriptors, shows why a plain division by 128 hides small tables, and compares the cached pages with the pages each table owns on disk.
Buffer Pool Pages for One Table in SQL Server
Buffer pool pages for one table show how much of one table sits in memory right now. This post lists them by index, page type and page level with sys.dm_os_buffer_descriptors, then shows which pages a seek, a scan and a large text read pull in. It uses the join that the documentation gives for each allocation unit type.
SQL SERVER – Fix Error: Currently This Report Does Not Have Any Data to Show, Because Default Trace Does Not Contain Relevant Information
If there is a way to fix the error which they get when they try to open Schema Changes History. The error was related to Not Have Any Data to Show.
SQL SERVER – Validating Positive Integer Strings with Explicit Boundaries
To Validate Natural integer strings, I define a nonempty positive ASCII-digit contract. A customer wanted a simpler validator.