[Bug 209571] ZFS and NVMe performing poorly. TRIM requests stall I/O activity
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Wed Feb 14 16:39:56 UTC 2018
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209571
Nick Evans <nevans at talkpoint.com> changed:
What |Removed |Added
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CC| |nevans at talkpoint.com
--- Comment #5 from Nick Evans <nevans at talkpoint.com> ---
Seeing the same on 11.0-RELEASE-p6 using a Samsung 960 EVO NVME. I've stopped
my (extremely slow) copy to the drive and this background traffic continues.
tty nvd0 da0 da1 cpu
tin tout KB/t tps MB/s KB/t tps MB/s KB/t tps MB/s us ni sy in id
0 150 32.00 456 14.25 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
0 493 32.00 455 14.22 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
0 151 32.00 454 14.18 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
0 164 32.00 455 14.21 0.00 0 0.00 0.00 0 0.00 0 0 0 0 100
I've seen this on another system with Intel 750 PCIe cards but if I remember
right it seemed to handle the background trim better. It's been a while since I
tested it though. Both systems are test boxes so I can test any changes needed
and can move them to whatever base system versions are needed.
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