I feel like this is probably something I should be able to find info on in an existing faq or archive, but I haven't been able to find anything. Are these daemons supposed to use a whole core 24x7? The setup *seems* to be functioning normally in initial testing PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ Flags WCHAN COMMAND 4576 root 20 0 580m 468m 4528 S 100.0 2.9 1259:56 ..4.214. futex_wai cmds 4480 root 20 0 138m 39m 2904 S 100.1 0.2 1259:39 ..4.214. futex_wai cmon PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ WCHAN Flags COMMAND 2540 root 20 0 1140m 861m 3656 S 100.0 2.7 1269:59 futex_wai ..4.214. cosd As you can see almost all of the time is spent in futex wait, strace reveals a billion polling events on one of the threads (on each of cmds,cmon,cosd), e.g: [pid 4583] poll([{fd=7, events=POLLIN|POLLRDBAND}, {fd=5, events=POLLIN|POLLRDBAND}], 2, 0) = 0 (Timeout) -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html