I've upgraded my laptop from FreeBSD-9.2 to FreeBSD-10.0 and, in the process, I've switched from UFS to ZFS, since the installer made it fairly easy. Previously I made use of tmpfs(5) for my /tmp directory. I've read some archived posts which indicated that using tmpfs(5) with ZFS could cause problems with memory or available space in the /tmp file. Is it still inadvisable to use tmpfs(5) with ZFS?