Re:ZFS 2.2.0 (RC): Block Cloning merged
by gorkish on Wednesday July 05, 2023 @02:01PM
(#36604390)
1. You shouldn't swap on ZFS, but really
2. You shouldn't swap on a filesystem, but really
3. You shouldn't swap at all.
On a VM host you have a bit of leeway for memory overcommit, but ideally if you have a box that frequently has to rely on swap, something is bad wrong. I don't think it's really fair to criticize a worst-choice configuration for being poorly supported here. There are simply too many opportunities for catch-22/deadlock scenarios in the interaction of the fs and allocator during OOM...
On a VM host you have a bit of leeway for memory overcommit, but ideally if you have a box that frequently has to rely on swap, something is bad wrong. I don't think it's really fair to criticize a worst-choice configuration for being poorly supported here. There are simply too many opportunities for catch-22/deadlock scenarios in the interaction of the fs and allocator during OOM...