extremely slow disk I/O after updating to 12.0

Robert Schulze rs at bytecamp.net
Thu Jul 4 07:49:31 UTC 2019


Am 03.07.19 um 16:33 schrieb David Demelier:
> 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?

I have set this tuneable in /boot/loader.conf.

with kind regards,
Robert Schulze

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