I''m sometimes seeing anomalously slow chown and chmod performance. System: thumper running S10U3 with a single pool of 4 raidz2 vdevs. I have a number of directory trees with something like 60 to 80 thousand files in each. As part of the processing of this data, it is necessary to chown and chmod the whole tree. So off to chmod -R and chown -R. Sometimes - on some filesystems - this takes between 4 and 5 seconds. Other times, between 4 and 5 minutes. What I can see from fsstat is that nsetattr and ngetattr are running at 10-15,000 calls per second. Which sort of makes sense in the case that takes a few seconds. But I see this same rate for the entire 4-5 minutes in the slow case. The behaviour seems repeatable. If I do it again, the same filesystems stay either fast or slow. Any ideas? -- -Peter Tribble http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/