[whargarbl]

"FaunaDB implements a process scheduler that dynamically allocates resources and enforces quality of service...Execution proceeds via cooperative multitasking."

Just like Windows 95! I don't think I've ever seen a database do this. Apparently it operates per-query or at least per application. Operating system seems right; this is a long paper.

[electrum]

Presto does this as well. Execution is done by "drivers" which move data pages between operators. It's a cooperative push model rather than a Volcano (iterator) style pull model. There are typically more drivers than worker threads. Drivers are assigned to threads using multilevel feedback queues (inspired by OS schedulers).

[my123]

SQL Server also uses its own scheduler inside ;)

[zenithm]

Dynamic isolation sounds cool especially without the overhead of containers. Seems obvious in hindsight I guess.