extremely slow disk I/O after updating to 12.0

David Demelier markand at malikania.fr
Wed Jul 3 14:33:24 UTC 2019

Le 03/07/2019 à 13:43, Robert Schulze a écrit :
> we have seen a drop in I/O performance beginning with 11.2-RELEASE.
> Try disabling scattered ABD:
> sysctl vfs.zfs.abd_scatter_enabled=0

Thanks for the answer. I'm trying this.

Is this tunable available at boot (i.e. /boot/loader.conf) or do you put 
it in /etc/sysctl.conf?



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