Op 30-01-15 om 19:40 schreef Gordon Messmer: > On 01/30/2015 01:21 AM, Patrick Bervoets wrote: >> iostat random sample > > "Random" is difficult to evaluate. Is that representative? Are sda, sdb, and sdc typically less than 1% utilized? Or are there large utilization values right after a hang? All the output was in the same scale and during a hang in an other shell. > > > Does the time displayed by "atop" eventually catch up? Not that I know. But I gave up :-) > > Does the problem persist across reboots? Alas, one of the vm's is our production database. My next update/reboot window is next saturday. But I had the problem just before the last reboot (halfway january). But hadn't closely monitored it afterwards. Before - in december - I never experienced it. But it's a server I tend do leave alone, so I'm never very busy on a shell. > > Is this system running ntpd? yes > > Does the problem persist if you turn ntpd off and reboot? > _ I'll check that next week.