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On 12/06/2024 4:32 pm, Tristan Horn via Starlink wrote:<br>
<blockquote type="cite" cite="mid:CALWT4TK5uiryD9JG4bLJsZHub_+-eo6S8gb3oQbMZU0ffKOu_Q@mail.gmail.com">
<div dir="ltr">Not my metrics, but spotted this on Reddit and I'm
always a sucker for Grafana graphs:<br>
<br>
<a href="https://www.reddit.com/r/Starlink/comments/1dd4wjs/i_collected_metrics_on_my_starlink_for_nearly_a/" moz-do-not-send="true" class="moz-txt-link-freetext">https://www.reddit.com/r/Starlink/comments/1dd4wjs/i_collected_metrics_on_my_starlink_for_nearly_a/</a><br>
<br>
I probably have little relevant to add (I returned my Starlink
terminal in 2023), but the thread inspired me to get some stats
going again myself (using the same <a href="https://github.com/czerwonk/ping_exporter" moz-do-not-send="true">ping_exporter</a>). I used to even
collect minutely traceroutes and single-stream TCP throughput
... I've gotten soft, I guess.<br>
</div>
</blockquote>
<p>The first thing I noticed looking at that graph was that the
average latency has been declining over time, with only two
discernible "steps". That tells me two things:</p>
<ol>
<li>Steps are generally the consequence of an event. For Starlink,
this could be introduction of (different) AQM resulting in lower
queue sojourn times. Or it could be different routing /
scheduling that results in lower physical path latencies as a
result of better paths being chosen.</li>
<li>Gradual decline over time is likely to be the result of a
longer-term change process. For Starlink, there are two longer
term trends that come to mind: customer numbers and satellite
capacity. I'd be inclined to suspect the latter is to "blame"
for the gradual decline component here. If your Dishy sees more
satellites now than a year ago, there's a higher probability
that it'll get to talk to a satellite that's closer to both you
and the respective gateway. You'd also expect stdev to decline
in the case, which again is what we see here.<br>
</li>
</ol>
<p>Minimal latency will happen pretty much when the "Starlinks
align" to give your ping empty queues with a satellite in
near-optimal position to your gateway. Again not surprising that
we don't see much of a drop here.<br>
</p>
--
<pre class="moz-signature" cols="72">****************************************************************
Dr. Ulrich Speidel
School of Computer Science
Room 303S.594 (City Campus)
The University of Auckland
<a class="moz-txt-link-abbreviated" href="mailto:u.speidel@auckland.ac.nz">u.speidel@auckland.ac.nz</a>
<a class="moz-txt-link-freetext" href="http://www.cs.auckland.ac.nz/~ulrich/">http://www.cs.auckland.ac.nz/~ulrich/</a>
****************************************************************
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