I was maxing out my 10Gb/s network connection before when transferring large files, but now the same transfers are lucky to reach 600Mb/s.
I’m guessing it’s a ZFS pool setting that I’ve overlooked, but I’m not sure which one it could be.
Update:
It’s occurred to me that I’m using an onboard Intel X557-AT2 port instead of an Aquantia 107 add-on card for 10Gbit ethernet this time.
Are the two controllers not equal?