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English Forums => General Discussion => Topic started by: moonman on March 21, 2019, 03:49:54 am

Title: [SOLVED] How to read Health -> Quality graph
Post by: moonman on March 21, 2019, 03:49:54 am: (https://i.imgur.com/1L5g9fO.png)

I understand that the latency for example is 15ms, but what is 400m for packet loss?
Title: Re: How to read Health -> Quality graph
Post by: franco on March 21, 2019, 09:53:14 am: Loss is in percent, 400m to 1 is 40% loss. The graph shares the y-axis with the millisecond values so it's a little hard to read indeed.

Cheers,
Franco
Title: Re: How to read Health -> Quality graph
Post by: Northguy on March 21, 2019, 09:02:39 pm: Does the graphical package offer a secondary y scale? Maybe it can be easily plotted in, making the graph easier to read?
Title: Re: How to read Health -> Quality graph
Post by: franco on March 21, 2019, 09:07:13 pm: I don't believe it does. RRD is relatively simplistic and static in these matters.

Cheers,
Franco
Title: Re: How to read Health -> Quality graph
Post by: moonman on March 24, 2019, 06:32:32 pm: Quote from: franco on March 21, 2019, 09:53:14 am
Loss is in percent, 400m to 1 is 40% loss. The graph shares the x-axis with the millisecond values so it's a little hard to read indeed.

Cheers,
Franco

Thanks. Makes sense.
Title: Re: How to read Health -> Quality graph
Post by: NKnusperer on April 20, 2021, 10:13:37 am: Quote from: franco on March 21, 2019, 09:53:14 am
Loss is in percent

Can you please describe what exactly this percentage mean?
For example I have a loss of up to 1.3 with a delay of 15, so 130% loss?. How do I interpret this?
I'm a bit confused ;D
Title: Re: How to read Health -> Quality graph
Post by: franco on April 20, 2021, 11:13:41 am: Quote from: franco on March 21, 2019, 09:53:14 am
Loss is in percent, 400m to 1 is 40% loss.

This seems rather self explanatory? I don't know what "1.3" is. Screenshot please.

Cheers,
Franco
Title: Re: [SOLVED] How to read Health -> Quality graph
Post by: chemlud on April 20, 2021, 11:29:56 am: I do such graphs on a daily basis, the y-axis is.. improvable... I would have ms on the left and %loss on the right. Then it would be fool-proof.

Or if you have only one y-axis in your graphing tool, choose ms and %loss on the same y-axis. No "400m" which is ambiguous at best.
Title: Re: How to read Health -> Quality graph
Post by: NKnusperer on April 20, 2021, 11:36:52 am: Quote from: franco on April 20, 2021, 11:13:41 am
Quote from: franco on March 21, 2019, 09:53:14 am
Loss is in percent, 400m to 1 is 40% loss.

This seems rather self explanatory? I don't know what "1.3" is. Screenshot please.

Cheers,
Franco

See attached screenshot with a value of 1.9 up to 3.3
Title: Re: [SOLVED] How to read Health -> Quality graph
Post by: NKnusperer on April 22, 2021, 01:20:37 pm: *bump*
Might this be a rendering bug in the graph and 1.9 is actually 1.9m or something?
Is there a way to see the raw values generated by dpinger?
Title: Re: [SOLVED] How to read Health -> Quality graph
Post by: franco on April 23, 2021, 10:26:18 am: Thanks for the screenshot. Depending on the graph interval I get a loss of up to 18 aggregated, basically higher with each interval increase. I think that either rrd is treating these values incorrectly or they are actually set up incorrectly or a mix of both (these are not package counters/bytes that can add up).

Does the value drop if you switch the resolution to "high"?

Cheers,
Franco
Title: Re: [SOLVED] How to read Health -> Quality graph
Post by: NKnusperer on April 23, 2021, 11:59:43 pm: Quote from: franco on April 23, 2021, 10:26:18 am
Does the value drop if you switch the resolution to "high"?

No, it actually increase, see attached screenshots.
Title: Re: [SOLVED] How to read Health -> Quality graph
Post by: NKnusperer on April 28, 2021, 08:17:11 am: Just a quick follow-up on this:
On Monday there was a WAN outage and during this time the loss peaked to 100 (see attached screenshot).
I think this confirms that the reported value is indeed the raw percentage as logged by dpinger ranging from 0 to 100 and not 0 to 1.
What do you think?
Title: Re: [SOLVED] How to read Health -> Quality graph
Post by: chemlud on April 28, 2021, 08:26:27 am: ...that should be quite easy to simulate, just pull the WAN cable. why does nobody know what the numbers mean? :-O