Trim on gmirrored SSDs is slow and results in inresponsive system

Steven Hartland killing at multiplay.co.uk
Wed Mar 4 13:25:39 UTC 2015


Do you have one disk which has really slow TRIM?

What's the output for:
camcontrol identify <disk>
grep quirks /var/run/dmesg.boot
sysctl kern.cam |grep sort_io_queue

Also how does gstat -d -p compare between gmirror and none gmirror 
installs on the same machine?

Do you see high kernel CPU when the deletes are happening?

     Regards
     Steve

On 04/03/2015 12:44, Robert Schulze wrote:
> Hi,
>
> I just want to point to the bugreport of a problem we and at least
> another one discovered.
>
> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197516
>
> Maybe this behaviour could be confirmed by others and narrowed down.
>
> with kind regards,
> Robert Schulze
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