Writing 8589934592 (eight gigs) into the zfs_arc_dnode_limit seemed to make an improvement: the arc_prune threads would periodically spike above 20% CPU use, but would return to 2-5% CPU use quickly; it worked well for a long time, perhaps even hours, before all the arc_prune threads returned to ~50% CPU use.
I tried one gigabyte for a bit but the arc_prune threads returned quickly. Tuning this may take a bit. Thanks for the tip. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1814983 Title: zfs poor sustained read performance from ssd pool To manage notifications about this bug go to: https://bugs.launchpad.net/zfs/+bug/1814983/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
