Esx.problem.visorfs.ramdisk.full

Problem

Fairly recently I came across this error message on one of my hosts “esx.problem.visorfs.ramdisk.full”

Fallout

While trying to address the issue I had the following problems when the ramdisk did indeed “fill up”

• PSOD (worst case happened only once in my experience)
• VM’s struggling to vMotion from the affected host when putting into maintenance mode.

Temporary workaround

A reboot of the host would clear the problem (clear out the ramdisk) for a short while but the problem will return if not addressed properly.