Higher latency on Metal | Railway | Page 1

untold plover Mar 31, 2025, 10:12 PM

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Hi

I did a test where I deployed a rust axum rest api twice, one on Metal and one on GCP. But the latency on Metal is just way higher.
The increased latency seems to be coming from the database connection.
I apologise in advance if I did something stupid :)

ornate geodeBOT Mar 31, 2025, 10:12 PM

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Project ID: N/A

untold plover Mar 31, 2025, 10:12 PM

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ebfe176f-63cb-441f-bcb3-f4a8de975077

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Following is a screenshot of the HTTP logs of the app deployed on GCP

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And the one on Metal

tired surge Mar 31, 2025, 10:14 PM

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did you also put the database on metal?

untold plover Mar 31, 2025, 10:14 PM

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should be yes. Metal app -> Metal database. GCP app -> GCP database

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I am EU btw

tired surge Mar 31, 2025, 10:15 PM

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is your metal service using the metal edge as well?

untold plover Mar 31, 2025, 10:16 PM

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I have tried switching between the metal edge and the old one but doesnt seem to make that much of a difference

tired surge Mar 31, 2025, 10:17 PM

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its a DNS update so please be patient, how long has the domain been on the metal edge?

untold plover Mar 31, 2025, 10:18 PM

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Well ive been switching between them pretty quickly. Just switched back to the Metal edge. How long do you recommend waiting before testing again?

tired surge Mar 31, 2025, 10:19 PM

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you can dig the domain, when it starts returning a list of IP addresses you should be good

untold plover Mar 31, 2025, 10:21 PM

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not too familiar with networking. Could you elaborate?

tired surge Mar 31, 2025, 10:21 PM

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dig, the cli tool

untold plover Mar 31, 2025, 10:27 PM

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Is it this you're looking for?

edge.railway.app.       152     IN      A       66.33.22.3
edge.railway.app.       152     IN      A       66.33.22.1
edge.railway.app.       152     IN      A       66.33.22.4
edge.railway.app.       152     IN      A       66.33.22.2

tired surge Mar 31, 2025, 10:28 PM

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yep thats the metal edge

untold plover Mar 31, 2025, 10:30 PM

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Have a couple dipping below 10ms now. But still on the higher side

tired surge Mar 31, 2025, 10:32 PM

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can you run a traceroute to one of the ip addressees?

untold plover Mar 31, 2025, 10:39 PM

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traceroute to 66.33.22.1 (66.33.22.1), 30 hops max, 60 byte packets
 1  172.20.64.1 (172.20.64.1)  0.222 ms  0.151 ms  0.164 ms
 2  mymodem (192.168.1.1)  0.707 ms  1.157 ms  0.891 ms
 3  10.24.49.76 (10.24.49.76)  9.628 ms  9.678 ms  10.193 ms
 4  * * *
 5  ae-64-100.ibrstr6.isp.proximus.be (91.183.241.200)  17.692 ms  17.436 ms  19.219 ms
 6  brx-b4-link.ip.twelve99.net (213.248.97.112)  19.279 ms  15.113 ms  15.188 ms
 7  adm-bb2-link.ip.twelve99.net (62.115.116.230)  17.139 ms  15.470 ms  15.726 ms
 8  adm-b12-link.ip.twelve99.net (62.115.137.191)  16.426 ms  17.138 ms  17.142 ms
 9  railwaycorp-ic-390073.ip.twelve99-cust.net (62.115.196.223)  18.081 ms  18.836 ms  17.939 ms
10  * * *
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tired surge Mar 31, 2025, 10:47 PM

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and if you could please visit https://rlwy-edge-info-production.up.railway.app/ and paste the response body here + your current location

untold plover Mar 31, 2025, 10:48 PM

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edge=railway/europe-west4-drams3a
zone=europe-west4-drams3a
ip=::ffff:100.64.0.2
forwarded=91.177.28.24
hs=f09480be9e4a
req=T6a7ncZgTVaGcj5738lYAA_3554946428

How accurate should my current location be? :)

tired surge Mar 31, 2025, 10:51 PM

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as accurate as you feel comfortable announcing publicly

untold plover Mar 31, 2025, 10:53 PM

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3550 Heusden-Zolder, Limburg, Belgium

tired surge Mar 31, 2025, 10:53 PM

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fr?

untold plover Mar 31, 2025, 10:54 PM

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always welcome

tired surge Mar 31, 2025, 10:54 PM

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you know these threads are indexed publically on google?

untold plover Mar 31, 2025, 10:54 PM

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thats just zipcode btw

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not street

tired surge Mar 31, 2025, 10:54 PM

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fair enough

untold plover Mar 31, 2025, 10:54 PM

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xd

tired surge Mar 31, 2025, 11:00 PM

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cc @raven siren - slightly slower response times on Metal.

✅ - db on metal
✅ - app on metal
✅ - region same as user
✅ - metal edge enabled
✅ - priv net for db comms

I can't think of anything else that could cause issues.

untold plover Mar 31, 2025, 11:04 PM

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Side note:
Even when querying an endpoint with no database interaction its still slightly slower.
GCP:

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Metal:

tired surge Mar 31, 2025, 11:05 PM

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interesting, ill let phin weigh in on this, so lets wait to hear back from him

untold plover Mar 31, 2025, 11:06 PM

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Thanks for your time and help in advance!

untold plover May 17, 2025, 5:34 PM

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Not sure if you guys looked any further into this but I just tested again and this seems to mostly be fixed. GCP still seems to be faster but its by a difference of <5ms on average.

#Higher latency on Metal