Columnstore transcoder wait types in SQL Server 2025
SQL Server 2025 adds 25 columnstore transcoder wait types. I found the names, XE descriptions, and what Microsoft documents.
LCK_M_SCH_A and LCK_M_SCH_C: New Lock Wait Types in SQL Server 2025
SQL Server 2025 adds LCK_M_SCH_A and LCK_M_SCH_C wait types. I checked the wait list, XE maps, Microsoft docs and local wait stats.
I Could Not Find Documentation for Most of What SQL Server 2025 Added
I diffed the SQL Server 2022 and 2025 system catalogs and checked 294 new items against Microsoft Learn. I found no documentation for 258.
Undocumented Wait Types Added in SQL Server 2022
SQL Server 2022 added 353 wait types. I grouped them by family and found 339 without a public description.
I Could Not Find Documentation for Most of What SQL Server 2022 Added
I diffed the SQL Server 2019 and 2022 system catalogs over the DAC and checked 558 new objects against Microsoft Learn. I found no documentation for 477.