| To: | "Davis, Todd C" <todd.c.davis@xxxxxxxxx> |
|---|---|
| Subject: | Re: disk.dev.avactive and disk.dev.aveq on RH Advanced Server |
| From: | kenmcd@xxxxxxxxxxxxxxxxx |
| Date: | Fri, 21 Mar 2003 04:52:18 +1100 (EST) |
| Cc: | "'pcp@xxxxxxxxxxx'" <pcp@xxxxxxxxxxx> |
| In-reply-to: | <29AD895CE780D511A8870002A50A666D04F90983@hdsmsx106.hd.intel.com> |
| Reply-to: | kenmcd@xxxxxxxxxxxxxxxxx |
| Sender: | pcp-bounce@xxxxxxxxxxx |
On Tue, 18 Mar 2003, Davis, Todd C wrote: > > With no disk activity on the system I see disk.dev.avactive and > disk.dev.aveq on the root drive. The last sample had some disk io but the > disk.dev.avactive number did not change and disk.dev.aveq number did not > change significantly. Are these metrics supposed to me accurate? They look > bogus to me. The counters are correct. The semantics of these metrics are brain-dead from birth ... a genetic weakness passed down through the generations from sadc in Unix edition 7 or thereabouts. When we get the tutorial out there, you'll see a long diatribe from me on how to measure disk performance, and aveq and avactive are highlighted as not helpful. |
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