interesting patterns in graphs
list Jon Boede
Our ping times occasionally turn up graphs like the attached... It seems to me that this is an artifact of how rrd averages multiple into time "buckets" but I am not quite sure of that... anybody have an opinion as to what causes it? If the image doesn't come through as an attachment, I've put it up on http://www.email.net/jon/hobbitping.png Curiously, Jon
Attachments (1)
attachment.png
list Jim Smith
I have no idea, but that sure is pretty cool-looking! <grin> Jim Smith SVHS Little Rock, AR
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From: Jon Boede [mailto:user-68c969ba1bfa@xymon.invalid] Sent: Wednesday, October 01, 2008 12:25 PM To: user-ae9b8668bcde@xymon.invalid Subject: [hobbit] interesting patterns in graphs Our ping times occasionally turn up graphs like the attached... It seems to me that this is an artifact of how rrd averages multiple into time "buckets" but I am not quite sure of that... anybody have an opinion as to what causes it? If the image doesn't come through as an attachment, I've put it up on http://www.email.net/jon/hobbitping.png Curiously, Jon
list Stef Coene
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On Wednesday 01 October 2008, Jon Boede wrote:
Our ping times occasionally turn up graphs like the attached... It seems to me that this is an artifact of how rrd averages multiple into time "buckets" but I am not quite sure of that... anybody have an opinion as to what causes it?
No. But I do have the same graphs on multiple hobbit installations. This issue was mentioned before on the mailint list but nobody had an answer. Stef
list Bill Arlofski
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Jon Boede wrote:
Our ping times occasionally turn up graphs like the attached... It seems to me that this is an artifact of how rrd averages multiple into time "buckets" but I am not quite sure of that... anybody have an opinion as to what causes it? If the image doesn't come through as an attachment, I've put it up on http://www.email.net/jon/hobbitping.png Curiously, Jon
I'm seeing similar graphs at my sites.
--
Bill Arlofski
Reverse Polarity, LLC
list Josh Luthman
I believe that graph is accurate for the network as many of us get those.
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On 10/1/08, Stef Coene <user-dbffe946c0f4@xymon.invalid> wrote:On Wednesday 01 October 2008, Jon Boede wrote:Our ping times occasionally turn up graphs like the attached... It seems to me that this is an artifact of how rrd averages multiple into time "buckets" but I am not quite sure of that... anybody have an opinion as to what causes it?No. But I do have the same graphs on multiple hobbit installations. This issue was mentioned before on the mailint list but nobody had an answer. Stef
--
Josh Luthman
Office: XXX-XXX-XXXX
Direct: XXX-XXX-XXXX
XXXX Wayne St
Suite XXXX
Troy, OH XXXXX
Those who don't understand UNIX are condemned to reinvent it, poorly.
--- Henry Spencer
list Werner Michels
Hi, If nothing else helps, maybe you can add some debug to look at the numbers before they get dropped in the rrd and so try to confirm or not that's a rrd consolidation characteristic or may be it could be the real net test numbers ... -wm
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----------------------- Original Message -----------------------
From: user-68c969ba1bfa@xymon.invalid (Jon Boede)
To: user-ae9b8668bcde@xymon.invalid
Date: Wed, 01 Oct 2008 12:24:47 -0500
Subject: [hobbit] interesting patterns in graphs
----
Our ping times occasionally turn up graphs like the attached... It seems to me that this is an artifact of how rrd averages multiple into time "buckets" but I am not quite sure of that... anybody have an opinion as to what causes it? If the image doesn't come through as an attachment, I've put it up on http://www.email.net/jon/hobbitping.png Curiously, Jon
list Larry Sherman
Years ago I saw a pattern in one of my connection graphs. I was testing hosts on the another subnet that had a older router providing connectivity. There was also an automated backup job of some local file systems, and then batch jobs dispatched 5 nights a week. And that was what stuck out: The pattern changed on Saturday/Sunday night. Larry Sherman RBS Global Banking & Markets Office: +X XXX XXX XXXX
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-----Original Message-----
From: user-a58d6bcc049e@xymon.invalid [mailto:user-a58d6bcc049e@xymon.invalid]
Sent: Wednesday, October 01, 2008 5:12 PM
To: user-ae9b8668bcde@xymon.invalid
Subject: Re: [hobbit] interesting patterns in graphs
Hi,
If nothing else helps, maybe you can add some debug to look at the
numbers before they get dropped in the rrd and so try to confirm or not
that's a rrd consolidation characteristic or may be it could be the real
net test numbers ...
-wm
----------------------- Original Message -----------------------
From: user-68c969ba1bfa@xymon.invalid (Jon Boede)
To: user-ae9b8668bcde@xymon.invalid
Date: Wed, 01 Oct 2008 12:24:47 -0500
Subject: [hobbit] interesting patterns in graphs
----
Our ping times occasionally turn up graphs like the attached... It seems to me that this is an artifact of how rrd averages multiple into time "buckets" but I am not quite sure of that... anybody have an opinion as to what causes it? If the image doesn't come through as an attachment, I've put it up on http://www.email.net/jon/hobbitping.png Curiously, Jon
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list Paul van Eldijk
Jon Boede schreef:
Our ping times occasionally turn up graphs like the attached... It seems to me that this is an artifact of how rrd averages multiple into time "buckets" but I am not quite sure of that... anybody have an opinion as to what causes it?
We had the same sort of graphs; after changing grom hobbitping to fping, they disapeared... Paul
list David B. Ritch
I have not noticed that sort of pattern in my graphs, but I've noticed that hobbit using hobbitping often records latencies an order of magnitude slower than I see with a command-line ping. David
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Paul van Eldijk wrote:Jon Boede schreef:Our ping times occasionally turn up graphs like the attached... It seems to me that this is an artifact of how rrd averages multiple into time "buckets" but I am not quite sure of that... anybody have an opinion as to what causes it?We had the same sort of graphs; after changing grom hobbitping to fping, they disapeared... Paul
list Josh Luthman
Did the graph change during the backup on just that duration of Saturday or was it changed from that point on?
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On 10/2/08, David B. Ritch <user-23cafa473f8d@xymon.invalid> wrote:I have not noticed that sort of pattern in my graphs, but I've noticed that hobbit using hobbitping often records latencies an order of magnitude slower than I see with a command-line ping. David Paul van Eldijk wrote:Jon Boede schreef:Our ping times occasionally turn up graphs like the attached... It seems to me that this is an artifact of how rrd averages multiple into time "buckets" but I am not quite sure of that... anybody have an opinion as to what causes it?We had the same sort of graphs; after changing grom hobbitping to fping, they disapeared... Paul
-- Josh Luthman Office: XXX-XXX-XXXX Direct: XXX-XXX-XXXX XXXX Wayne St Suite XXXX Troy, OH XXXXX Those who don't understand UNIX are condemned to reinvent it, poorly. --- Henry Spencer