David Alcock reviews the latest SQL Server 2019 cumulative update:
Microsoft recently released Cumulative Update 15 for SQL Server 2019. It contains a bunch of fixes and some improvements, I get a bit geeky with updates like this and love to have a look through the different fixes to see “Physical reads for read-ahead reads are counted incorrectly (two times) when you run queries. Therefore, the information in sys.query_store_runtime_stats and sys.dm_exec_query_stats shows incorrect values.”
Read on to see what this means and a quick test to see if it works as expected.