On 7/25/07, John Glowacki <user-a1361bcdf988@xymon.invalid> wrote:
Peter Welter wrote:
One of the things I'd like to see in 4.3.0 is what is already partly
available on Sun-boxes in 4.2.0, the [iostatdisk] part. The stats are
gathered but not plotted. I hope this monitor will make it, on all
platforms, because you can pinpoint any disk performance problems much
easier.
Thanks, Peter
That would be good to have. I have been asked if hobbit does this from
other groups in the company.
Tracking disk IO gets complicated pretty quickly for a few reasons:
* OS's don't have common commands for measuring disk performance
* Do you watch IO by filesystem or spindle? If you have RAID,
grabbing the data can become even more difficult.
* People can disagree on what good disk IO means, and even fewer
understand disk IO workloads.
* I have no idea if Windows and the WMI has this kind of info.
For *ix, the "blocked processes" of vmstat is an excellent way to see
if the server overall is IO bound. I would definitely like to see
that a "stock" displayed metric in 4.3.0. Most *ix vmstat provides
that number. Similar to the iostat for Solaris, the info is
collected, just not displayed.
Scott Walters
-PacketPusher