Re: bhyve disk performance issue

On Fri, Feb 16, 2024 at 12:43 PM Chuck Tuffli <chuck@tuffli.net> wrote:

> On Fri, Feb 16, 2024, at 9:19 AM, Matthew Grooms wrote:
>
> Hi All,
>
>
> I'm in the middle of a project that involves building out a handful of
> servers to host virtual Linux instances. Part of that includes testing
> bhyve to see how it performs. The intent is to compare host storage options
> such as raw vs zvol block devices and ufs vs zfs disk images using hardware
> raid vs zfs managed disks. It would also involve
>
>
> …
>
> Here is a list of a few other things I'd like to try:
>
> 1) Wiring guest memory ( unlikely as it's 32G of 256G )
> 2) Downgrading the host to 13.2-RELEASE
>
>
> FWIW we recently did a similar exercise and saw significant performance
> differences on ZFS backed disk images when comparing 14.0 and 13.2. We
> didn’t have time to root cause the difference, so it could simply be some
> tuning difference needed for 14.
>
> —chuck
>

I myself am actually doing something very very similar.
I was seeing atrocious disk performance until I set the disk type to nvme.
Now it's screaming fast.

disk0_type="nvme"

Not sure what yours is set at, but it might be worth looking into.

~Paul
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