zfs meta data slowness

[Eugene Grosbein]

19.07.2020 21:17, mike tancsa wrote:
> Are there any tweaks that can be done to speed up or improve zfs
> metadata performance ? I have a backup server with a lot of snapshots
> (40,000)  and just doing a listing can take a great deal of time.  Best
> case scenario is about 24 seconds, worst case, I have seen it up to 15
> minutes.  (FreeBSD 12.1-STABLE r363078)

I believe you have to perform kernel profiling for your specific use case.