OpenZFS on OS X

Hi, everyone. I'm running OpenZFS 1.5.2 on OS X El Capitan 10.11.6 (15G31) on a Mac Pro, and have a very large zraid1 consisting of 4 x 8TB drives in a Thunderbolt enclosure. Everything is working well, but there is likely a memory leak that is forcing me to reboot every few days. Basically, if I mount the volume, memory usage starts to go up, and after a few days, a system process is at around 50GB.

I'm running OpenZFS 1.5.2 on a second Mac Pro that does not have this problem (zraid2, 8 x 6TB drives connected by Thunderbolt).

Has anyone else had this issue? Can I help figure out whether this is, indeed, an OpenZFS bug?

First, I'm no ZFS guru... but since I just saw this and nobody answered yet..
Do you have a lot of memory in your machine?
If so, I think ZFS can use a LOT after some time.

You can limit memory usage:
https://openzfsonosx.org/wiki/Memory_utilization

I'm also experiencing memory issues. Memory is not getting returned when the system is under pressure.

Yes 1.5.2 is a bit of a hog, and we have fixes in the pipeline, looking for the correct sacrificial item for a build to happen.