Limiting ZFS ARC Size?

[Bob Willcox]

Is there a way to limit the size of the ZFS ARC cache? I am running a
12-current system with 32GB of memory and the ZFS ARC grows to a hughe size,
to the point where my running processes (such as firefox) start page
thrashing.

bob at tavion:13 /home/bob> uname -a
FreeBSD tavion.austin.ibm.com 12.0-CURRENT FreeBSD 12.0-CURRENT #3 r335222: Fri Jun 15 13:40:49 CDT 2018     bob at tavion.austin.ibm.com:/usr/obj/usr/src/amd64.amd64/sys/TAVION  amd64

I would like to be able to limit how much memory ZFS grabs for this cache?

Thanks for any help/pointers!

Bob

-- 
Bob Willcox    | Isn't air travel wonderful?
bob at immure.com | Breakfast in London, dinner in New York,
Austin, TX     | luggage in Brazil.