| To: | Ken McDonell <kenj@xxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: Calculated/derived metrics? |
| From: | fche@xxxxxxxxxx (Frank Ch. Eigler) |
| Date: | Thu, 07 May 2015 16:35:45 -0400 |
| Cc: | pcp@xxxxxxxxxxx |
| Delivered-to: | pcp@xxxxxxxxxxx |
| In-reply-to: | <554AFE4E.80000@xxxxxxxxxxxxxxxx> (Ken McDonell's message of "Thu, 07 May 2015 15:55:26 +1000") |
| References: | <5534C680.2020709@xxxxxxxxxx> <493537984.3276058.1429528962326.JavaMail.zimbra@xxxxxxxxxx> <5534EBA8.4030509@xxxxxxxxxx> <1644393599.3651017.1429563442835.JavaMail.zimbra@xxxxxxxxxx> <55364606.1000503@xxxxxxxxxx> <55472B40.7050800@xxxxxxxxxx> <5547DE11.5050800@xxxxxxxxxxxxxxxx> <5549E4CD.5000408@xxxxxxxxxx> <554AFE4E.80000@xxxxxxxxxxxxxxxx> |
| User-agent: | Gnus/5.1008 (Gnus v5.10.8) Emacs/21.4 (gnu/linux) |
kenj wrote: > [...] >> [...] For example, I tried to derive the bytes-written/s for a >> process being monitored with hotproc. A process' lifetime can roughly be >> calculated with kernel uptime - the process' start_time / 100. But >> testing with something like: >> >> write_per_sec = hotproc.io.write_bytes / (kernel.all.uptime - >> hotproc.psinfo.start_time/100) >> >> leads to an (expected) error as there are several instances. ... > [...] > The problem in your example is that the expression involves the > counter hotproc.io.write_bytes and this is being divided by > something with the units of time that is not a counter. [...] Is the rate() derived-metrics function applicable here? - FChE |
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