vm.kmem_size for stability to avoid kernel panics?

[Gil Vidals]

The ZFS Tuning guide says that no tuning may be necessary on servers with 2+
GB of RAM.

*"FreeBSD 7.2+ has improved kernel memory allocation strategy and no tuning
may be necessary on systems with more than 2 GB of RAM."*
However, is it advisable to put an upper limit for these two parameters to
ensure stability and avoid kernel panics?

vm.kmem_size
vm.kmem_size_max

Thank you.

Gil Vidals / VMRacks.com