So how about on the month, and year graphs? Is the now value approximated using the month and yearly values? Cause these are way off. We've only been operating a couple of weeks, so the data for those graphs is very limited. Any way to just remove the now field from the graphs? Thanks for the details. jon
From: S Shipway [via RRD Mailinglists] [mailto:[email protected]] Sent: Tuesday, May 27, 2014 5:45 PM To: Silver, Jonathan Subject: Re: How is the "now" value is calculated Avast, ye swabs; John Silver told I: > Each graph has a "now" value display as part of that graph and I'm wondering > from where and how that value is calculated. Our metrics are all defined as > gauges (because they com through various tooling like sflow or jmxtrans or > gmetric. some support type, other do not). > > The metric I'm collecting is an integer counter. But I'm sometimes seeing the > max (and last) value as NN.nn where nn is not 00. Why would this (or the > max value) never always be a whole number? The short answer is Data Normalisation. This is explained in Alex van den Bogeardt's tutorial here: http://www.vandenbogaerdt.nl/rrdtool/process.php The long answer is that RRDTool will adjust incoming values using a linear approximation in time in order to make them fit into strict time samples. So, if your RRD is set up with a 1-minute step, it expects all samples to arrive precisely on the 1minute boundary when the number of seconds is 0. If the data arrive after this (such as at 12:00:15 instead of at 12:00:00) the values are normalised to what they would have been expected to be at this earlier time. This results in the fractional values you are experiencing. It is important to realise that RRDTool treats all values as Rates, and this normalisation does not affect the overall rate or total. Steve Steve Shipway [hidden email]</user/SendEmail.jtp?type=node&node=7582093&i=0> _______________________________________________ rrd-users mailing list [hidden email]</user/SendEmail.jtp?type=node&node=7582093&i=1> https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users [http://rrd-mailinglists.937164.n2.nabble.com/images/icon_attachment.gif]smime.p7s (7K) Download Attachment<http://rrd-mailinglists.937164.n2.nabble.com/attachment/7582093/0/smime.p7s> ________________________________ If you reply to this email, your message will be added to the discussion below: http://rrd-mailinglists.937164.n2.nabble.com/How-is-the-now-value-is-calculated-tp7582091p7582093.html To unsubscribe from How is the "now" value is calculated, click here<http://rrd-mailinglists.937164.n2.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=7582091&code=am9uYXRoYW4uc2lsdmVyQHVuaWZ5LmNvbXw3NTgyMDkxfDE3MTM3NzA5ODA=>. NAML<http://rrd-mailinglists.937164.n2.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.NodeNamespace&breadcrumbs=notify_subscribers%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml> -- View this message in context: http://rrd-mailinglists.937164.n2.nabble.com/How-is-the-now-value-is-calculated-tp7582091p7582166.html Sent from the RRDtool Users Mailinglist mailing list archive at Nabble.com. _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
![http://rrd-mailinglists.937164.n2.nabble.com/images/icon_attachment.gif]smime.p7s](http://rrd-mailinglists.937164.n2.nabble.com/images/icon_attachment.gif]smime.p7s){kind=link}