A wait stats collection script saves snapshots of sys.dm_os_wait_stats into a table, so you can compare two snapshots instead of reading totals since the last restart. This post builds the tables and a snapshot procedure, creates a small load, and reports the change with a category for each wait. It also covers idle waits, restarts and retention.
SQL SERVER – Get Wait Stats Related to Specific Session ID With sys.dm_exec_session_wait_stats
From SQL Server 2016, sys.dm_exec_session_wait_stats shows wait stats for a specific session ID. Here is how to use it, and why it fails on older versions.
SQL SERVER – 3 Different Usage of DBCC SQLPERF
DBCC SQLPERF can report log usage or reset cumulative wait and latch statistics. I separate reporting from resetting the baseline.
SQL Server – Configuration Manager Console Running Very Slow and Time Out
A Compatibility Level change helped one customer’s Configuration Manager Console. I keep that incident separate from a universal repair recommendation.
SQL SERVER – Database Scoped Configurations – Query Optimizer Fixes
During recent SQL Server Performance Tuning Practical Workshop I receive following question about Query Optimizer Fixes.
SQL Download – SQL Server Management Studio (SSMS) – Performance Dashboard
The latest SQL Server Management Studio now includes the Performance Dashboard by default. Here is the free SSMS download link and a quick look at it.
Auto-Created Statistics: What the _WA_Sys Names Tell You
Read auto-created statistics through sys.stats and sys.stats_columns, then use their columns as clues for better query tuning.