I must have missed any mention this being fixed in RC3, but see vm_fault.c was recently updated. The previous behaviour in the beta's and RC1/2 was fairly tragic for us because we have largish mmap'ed files using NO_SYNC. I updated one of our test boxes (5:30pm yesterday) from 10.0p9 to 10.1RC3 and looks good now. When we tried the BETAs, disk activity sky rocketed and performance dropped off a cliff. http://www.akips.com/gz/downloads/system-graphs-10.1-rc3-24h.html http://www.akips.com/gz/downloads/system-graphs-10.1-rc3-48h.html Not sure why there was a drop in memory usage though, so we'll investigate that. Paul. -- Paul Koch | Founder, CEO AKIPS Network Monitor http://www.akips.com Brisbane, Australia