Hi, On 2024-01-23 13:09:22 +0100, Thomas Kellerer wrote: > Yoni Sade schrieb am 21.01.2024 um 19:07: > > It would be useful to have the ability to define for a role default > > vCPU affinity limits/thread priority settings so that more active > > sessions could coexist similar to MySQL resource groups > > <https://dev.mysql.com/doc/refman/8.0/en/resource-groups.html>. > > To a certain extent, you can achieve something like that using Linux cgroups > > https://www.cybertec-postgresql.com/en/linux-cgroups-for-postgresql/
If you do that naively, you just run into priority inversion issues. E.g. a backend holding a critical lwlock not getting scheduled for a while because it exceeded it CPU allocation, preventing higher priority processes from progressing. I doubt you can implement this in a robust manner outside of postgres. Regards, Andres
