Peter,
I first want to thank you for your post and the time you took to write it.
The heartbeat used to create the RRD is already set to 120 seconds (which is
the expected in this case) so my guess is that this is not at cause here.
Also, the value I see in the Statistic timeslot is the value for the first
minute for every 5 minute time slice; it is reflected in the table provided in
my first post and this was repeatable for every 5 five time slice I checked. It
was most obvious in time slices where the first minute saw a surged to a high
number (eg.: 220 Mb/s) and then stayed around 40 Mb/s for the remaining 4
minutes: the value displayed in the Statistic timeslot would be 220 Mb/s for
every minute in this 5 minute time slice whereas the average would have given
something around 76Mb/s.
If you have any other idea, it is most welcome.
Thank you!
Best regards,
Yannick
From: Peter Krüpl [mailto:[email protected]]
Sent: Monday, May 30, 2016 4:17 PM
To: Yannick D'Amboise
Cc: [email protected]
Subject: Re: [Nfsen-discuss] Unexact results in Shadow profile Statistics
timeslot after changing CYCLETIME value
Hi,
My first post in the list, i have been reading it for a long time though.
Could this be caused my the heartbeat interval set in the rrd files ?
I don’t know of the code, takes the configured poll period into account when
creating the rrd files.
If it des you could try to configure a new source, which the should have
freshly created red files with the correct period.
The statistics timeslots probably give you the average over 5 periods.
You could verify this by inspecting the red files with rrdtool directly….
Med venlig hilsen / Kind Regards
Peter Krüpl
On 30/05/2016, at 17.02, Yannick D'Amboise
<[email protected]<mailto:[email protected]>> wrote:
Hi,
Anyone can help?
Thank you!
Regards,
Yannick
From: Yannick D'Amboise
Sent: Friday, May 27, 2016 11:05 AM
To:
[email protected]<mailto:[email protected]>
Subject: Unexact results in Shadow profile Statistics timeslot after changing
CYCLETIME value
Hi all,
Using the information provided in this post
“http://serverfault.com/questions/731957/change-nfsen-to-poll-and-graph-every-30-seconds”,
I was able to make NFSen poll and graph data every 60 seconds instead of the
usual 300 seconds. However, in any of the shadow profile created afterwards,
the results displayed in the “Statistics timeslot” section follow the original
300 second sequence whereas the graphs are fine and reflect the 60 second time
slices.
Please see the table below to have a better view of the behavior I refer to:
t-start t-end Graph
value Statistics timeslot value
2016-05-27-10-20 2016-05-27-10-20 ~50Mb/s 53.1Mb/s
2016-05-27-10-21 2016-05-27-10-21 ~40Mb/s 53.1Mb/s
2016-05-27-10-22 2016-05-27-10-22 ~400Mb/s 53.1Mb/s
2016-05-27-10-23 2016-05-27-10-23 ~150Mb/s 53.1Mb/s
2016-05-27-10-24 2016-05-27-10-24 ~75Mb/s 53.1Mb/s
2016-05-27-10-25 2016-05-27-10-25 ~75Mb/s 77.7Mb/s
2016-05-27-10-26 2016-05-27-10-26 ~60Mb/s 77.7Mb/s
As can be seen, the “Statistics timeslot” value is the same between 10h20 and
10h24 and changes at 10h25 and keep being the same for the next five minutes
and so on, while the graph does reflect the 60 second configuration that was
previously made.
I would like to know what I am missing to make it display correct data for 60
second time frames in the “Statistics timeslots” section.
I would also like to understand why I have this behavior since my understanding
was that shadow profiles took their data from the same RRD for both sections so
I am puzzled by the discrepancy between the two.
For your information, everything else seem to work fine (NFSen has been running
with this config for 2 weeks now and all other data appear to be OK).
Thank you in advance for your assistance and help.
Regards,
Yannick
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