Here is the graph of the latency, also from munin. Showing the exact opposite to the other graph. This one gives an answer that I believe is correct (or at least it is plausible). Note that /dev/sdc is the fastest drive, and shows the lowest latency. Also note that when loaded heavily, the latency on /dev/sda and /dev/sdb go up (they are RAID mirror so they move together).
** Attachment added: "Disk latency per device - by week" https://bugs.launchpad.net/ubuntu/+source/munin/+bug/919429/+attachment/2684669/+files/diskstats_latency-week.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/919429 Title: Munin "IO Service Time" graph gives completely implausible numbers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/munin/+bug/919429/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
