graphite-dev team mailing list archive

[Nicholas Leskiw <nleskiw@xxxxxxxxx>]

Re-read my post, use the cumulative() to override the averaging. And since this is OSS, you can hack your install to make cumulative the default.  Or a configuration option, then you can submit the patch and give back to the community. 

The reason people like avg, is when dealing with response times.

-Nick

Sent from a mobile device.
Please excuse terse language and spelling mistakes.

Mark Seger <question177524@xxxxxxxxxxxxxxxxxxxxx> wrote:

>Question #177524 on Graphite changed:
>https://answers.launchpad.net/graphite/+question/177524
>
>Mark Seger posted a new comment:
>Thanks for the timely response.  I'm definitely happy to hear it has a
>distributed model which we all know is really the only way to scale.
>Sounds like definitely worth taking a closer look at when I get some
>more time.
>
>As for the number of datapoints vs pixels, this is the EXACT problem I
>have with rrd.  As you change the the time scale of the display, the
>graphs themselves can actually change and I think that's a huge no-no.
>
>The bottom line is by default, collectl generates 8640 data points/day
>at a 10 second monitoring interval and I will typically look at a day's
>worth of data to see if there are any spikes.  RRD, and it sounds like
>graphite too, cannot fit all those points on a graphs and so averages
>them, destroying the spikes.  For that reason my tool of choice has
>always been gnuplot which is fast and plots everything you tell it to.
>If a few points fall in the same interval, gnuplot simply plots all them
>and you can clearly see the spikes.
>
>I don't know if graphite has the ability to display multiple points at
>the same time as it would clearly break the 'prettiness' of the plots,
>but I don't care about pretty, I care about accuracy and I'm afraid this
>would be a show stopper for me, at least as for using graphite as a
>diagnostic tool.  Has anyone considered alternate plotting styles for
>when this is a concern?  Does graphite actually build the plots itself
>or does it rely on some other tool?  If the former, in theory it
>shouldn't be that difficult to support an alternate style.
>
>I realize most people probably don't get into that level of analysis of
>the data, but that has always been the #1 consideration for me -
>accurate data by which you can then do detailed analysis of most system
>/cluster-wide problems.  I've always wondering how many people think
>their systems are running just fine when in fact there are all kinds of
>horrible things going on that they don't know about because they're
>either monitoring at a granularity of a minute or more and/or are using
>rrd and not seeing any real problems.
>
>re <1 second intervals:  not really a big deal as 1 second is usually
>more than sufficient for looking at data in real-time.
>
>-mark
>
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