On Tue, Nov 16, 2010 at 1:55 PM, Alexander Leidinger <alexan...@leidinger.net> wrote: > How do you measure that nothing is read or written to it? >
I used zpool iostat -v > Please check with > gstat -f '^<DEVICE>$' > if there are really no reads/writes to the device (please replace <DEVICE> > with the name of your USB device, e.g. da0). > > If you see writes, I would say > - this is the reason for the load > - your cache is on the way to be filled with > useful data > I see almost no writes (nor reads) > If gstat shows zero activity, I suggest to run 'top -S' and look at the > process(es) which consume about 10% CPU (do not take care about the idle > process). Based upon this we can maybe suggest further things to > investigate. > Heres the output of that: CPU: 0.0% user, 0.0% nice, 11.8% system, 0.0% interrupt, 88.1% idle Mem: 841M Active, 193M Inact, 5086M Wired, 4876K Cache, 1237M Buf, 5750M Free Swap: 8192M Total, 8192M Free PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND 11 root 8 171 ki31 0K 128K CPU0 0 ??? 713.62% idle 5 root 5 -8 - 0K 76K zvol:i 5 401.9H 91.16% zfskern Thanks for your time on looking into this :-) -- chs, _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"