A CPU scheduler waiting on disk shows pending disk IO on its scheduler. This post reads sys.dm_os_schedulers once and in a short sampling loop, then confirms the result with file latency.
SQL SERVER – Troubleshooting High CPU
We are going to discuss Troubleshooting High CPU in SQL Server. This is why many hire me for Comprehensive Database Performance Health Check.
Generate Script of SQL Server Objects – SQL in Sixty Seconds #184
Today we will see the same concept translating in the video. Let us learn about Generate Script of SQL Server Objects in video format.
SQL SERVER – NOLOCK with DMVs
NOLOCK with DMVs is not a blanket reassurance against monitoring waits. A customer asked about omitting the hint.
Aggregate Pushdown: Letting the Columnstore Scan Do the Summing
Verify aggregate pushdown in columnstore scans, inspect locally aggregated rows, and compare numeric aggregates with expressions.
SQL SERVER – Get Last Restore Date
I report Restore Date from the latest retained msdb history row. My earlier query returned every matching entry.
Reclaim Space After Dropping a Column With DBCC CLEANTABLE
To reclaim space after dropping a column, run DBCC CLEANTABLE or rebuild the index. This post measures both on a demo table and shows that CLEANTABLE shrinks the rows while only a rebuild returns the pages.