Re: [rrd-users] How to find a grafics error?
Peter A. Menzel ad...@famenzel.at wrote: I actually found some missing update values - that means not every second a new set of values. Now I intent to tune the heartbeat value to 5 instead of 2, and step size of 1 remain constant... So missing 1, 2 or 3 measures will not generate an *unknown* value in the RRD. Do you think that is the right way? It's probably the right thing to do and my guess is that it will cure your gaps - but really it's your data, you have to decide whether it's right for your needs. Some people want to see the unknowns, others want to ride over them. ___ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
Re: [rrd-users] How to find a grafics error?
Hi Simon and David, thank you for your hints! I actually found some missing update values - that means not every second a new set of values. Now I intent to tune the heartbeat value to 5 instead of 2, and step size of 1 remaining constant... So missing 1, 2 or 3 measures will not generate an *unknown* value in the RRD. Do you think that is the right way? Thank you and BR Peter nbsp; Simon Hobson schrieb: Peter A. Menzel prot_from_s...@famenzel.at wrote: nbsp; Here is the setup script: rrdtool create AgroFire.rrd --step 1 \ DS:KesselTemp:GAUGE:2:U:U \ ... RRA:AVERAGE:0.5:1:864000 \ Can you be certain that you provide an update *every* second ? You have a step size of 1, and a heartbeat value of 2. That means that you can only have data 2 seconds old before it is considered unknown. What isn't clear is which side of the point the decision is taken as the manual says : heartbeat defines the maximum number of seconds that may pass between two updates of this data source before the value of the data source is assumed to be *UNKNOWN*. Eg, if you miss an update at time t=1 having done one at time t=0, does the value become unknown at time t=2 or *after* time t=2. The difference is that if you miss just one update, then in the former condition, when you come to do the update at time t=2, the data from time t=0 to time t=2 will be marked as unknown; but if it's the latter then the data wouldn't become unknown unless you also miss an update at time t=2. So firstly I would be checking to see that you are reliably doing an update every second and not creating a few unknown values. You might consider increasing the heartbeat value. You have specified an xff value of 0.5, so you would regard a consolidation as unknown if 50% of the source values are unknown. Since missing one update could be marking 2 seconds worth (ie 2 primary steps) as unknown, then missing an average of one update every 4 seconds would result in missing consolidated data. ___ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users nbsp; ___ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
Re: [rrd-users] How to find a grafics error?
Peter A. Menzel prot_from_s...@famenzel.at wrote: Here is the setup script: rrdtool create AgroFire.rrd --step 1 \ DS:KesselTemp:GAUGE:2:U:U \ ... RRA:AVERAGE:0.5:1:864000 \ Can you be certain that you provide an update *every* second ? You have a step size of 1, and a heartbeat value of 2. That means that you can only have data 2 seconds old before it is considered unknown. What isn't clear is which side of the point the decision is taken as the manual says : heartbeat defines the maximum number of seconds that may pass between two updates of this data source before the value of the data source is assumed to be *UNKNOWN*. Eg, if you miss an update at time t=1 having done one at time t=0, does the value become unknown at time t=2 or *after* time t=2. The difference is that if you miss just one update, then in the former condition, when you come to do the update at time t=2, the data from time t=0 to time t=2 will be marked as unknown; but if it's the latter then the data wouldn't become unknown unless you also miss an update at time t=2. So firstly I would be checking to see that you are reliably doing an update every second and not creating a few unknown values. You might consider increasing the heartbeat value. You have specified an xff value of 0.5, so you would regard a consolidation as unknown if 50% of the source values are unknown. Since missing one update could be marking 2 seconds worth (ie 2 primary steps) as unknown, then missing an average of one update every 4 seconds would result in missing consolidated data. ___ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
Re: [rrd-users] How to find a grafics error?
I would also like to point out that if you have a couple of unknowns in the hi res data they might not be noticeable at high res, but as you aggregate data a single unknown value in a group of aggregated values will make the aggregate value unknown making it more noticeable. unknowns propagate , taking out larger and large data points ( This is also true for cdefs . ) . David On Wed, Jun 10, 2015 at 6:09 AM, Peter A. Menzel prot_from_s...@famenzel.at wrote: Hello, my cgi output for the monthly periode seems to have errors (in detail: see attached image). As you can see on http://hk1.famenzel.at/cgi/hk1.cgi the output for the last week (letzte Woche) is ok (continued graphs for the temperatures), but shown interrupted in the monthly graph (letzter Monat). Also the pump indicators (HK1Pumpe, HK3Pumpe aso) show some activity in this graph and the yearly one (letztes Jahr). This seems to be wrong too. How can I find the source of the problem? Thank you and BR Peter ___ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users ___ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
Re: [rrd-users] How to find a grafics error?
Peter A. Menzel prot_from_s...@famenzel.at wrote: my cgi output for the monthly periode seems to have errors (in detail: see attached image). As you can see on http://hk1.famenzel.at/cgi/hk1.cgi the output for the last week (letzte Woche) is ok (continued graphs for the temperatures), but shown interrupted in the monthly graph (letzter Monat). Also the pump indicators (HK1Pumpe, HK3Pumpe aso) show some activity in this graph and the yearly one (letztes Jahr). This seems to be wrong too. How can I find the source of the problem? You'll need to provide a lot more information - at the moment it's I create a graph using an unknown script/command, using unknown data, and 'it doesn't work'. A first step would be to show what commands you used to create the RRD files and the graphs, plus a sample of the data going in. Your graph in the email (the link doesn't work for me) has breaks in it - that can often be as simple as having a heartbeat interval that's too short so you get a lot of unknown data. ___ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
[rrd-users] How to find a grafics error?
Hello, my cgi output for the monthly periode seems to have errors (in detail: see attached image). As you can see on http://hk1.famenzel.at/cgi/hk1.cgi the output for the last week (letzte Woche) is ok (continued graphs for the temperatures), but shown interrupted in the monthly graph (letzter Monat). Also the pump indicators (HK1Pumpe, HK3Pumpe aso) show some activity in this graph and the yearly one (letztes Jahr). This seems to be wrong too. How can I find the source of the problem? Thank you and BR Peter ___ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
