For those who don't know, solaris uses tmpfs for /tmp. It is a virtual memory/swap based file system. Anything in /tmp is actually temporary if the machine reboots/powers off.
I like setting this up on Linux machines too. There are tons of ephemeral files that get written there, depending on your usage case, and I'd rather not waste the IO for writing pids to lockfiles. Disk is cheap, but RAM is fast and cheap. :)
