last version it happen on was 274
so, it's solved in recent builds?
if not, tell me when this problem started.
the .vfs file is removed when the process is ended.
that is not normal, unless HFS was currently saving the file, and killing causes the file to be empty/deleted.
yes hfs runs for month after month with those hits every day , then sudenly it hangs and use al that memory.
if it takes a month to reproduce the problem we may never see the light.
HFS is not exactly a rock-solid software, maybe restarting it once a week. You can automate it.