Forum Discussion

wiry's avatar
wiry
On our wavelength
19 days ago
Solved

Approximately hourly latency spikes

What it sounds like. Approximately every hour I have a very noticeable latency spike, which can last a couple seconds or be up to around 5 or more minutes. If my memory serves, this has only started happening relatively recently, in the past 3-5 weeks. I have experienced this wired and over wifi, and have had it happen at different times of day while I've been doing different things. It is (unsurprisingly) most noticeable when gaming, as latency spikes of 400, 600, 800 or more are impossible to miss, but it is also impacting me when I'm trying to work, as git and github dont like 4s latencies either -most stuff loads forever or just gives up when it happens.
I had the hub 3 in modem mode, as I'm using my own (mesh) access points, as the vm kit simply cant cover my home, so I switched the hub to router mode in case it was a firmware bug (double NAT-ing myself - nice) but it has not helped.

This is not relevant to network load, these are consistent spikes that happen daily, and I have no reason to believe it's "bufferbloat" or whatever. I have had bqm set up from the 30th of March, when I switched the hub to router mode, to see what latency looks like from the outside, and it's clearly there. I also have an example from the 4-5th of April which show what the latency looks like under consistent load (during a backup upload) - higher base/average but the high spikes are still there. BQM only seems to show up to 160ms, but I have experienced far FAR higher spikes.

I have pinhole reset my hub 3 (~2am apr 7), but i doubt it will help.

mar 30 (red at start is modem mode+firewall blocking pings)








mar 31

 

 

 

 

 

apr 1

 

 

 

apr 2 (red bar is unrelated, breakers tripped)

 

 

 

 

 

 

apr 3

 

apr 5 (~4pm backup upload finishes)
apr 6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Live graph:

 

  • The vm engineer that visited couldnt find anything obviously wrong with the hub, but they offered to replace my hub 3 with a hub 5, and it seems to have fixed it. My latency is now nice and consistent, thanks.



6 Replies

  • legacy1's avatar
    legacy1
    Alessandro Volta

    When yes this can be and most likely is a VM issue due to upstream being over loaded like a surge that everyone in your area just hit the upstream hard that you buffer.

    What own router do you have does it do speed tests?

  • jbrennand's avatar
    jbrennand
    Very Insightful Person

    Check this first....  

    Do the spikes disappear when you put the VM Hub back into normal router mode for a few hours (overnight)?

    If they do... then the issue lays with your own router - what make and model is it ?

  • wiry's avatar
    wiry
    On our wavelength

    The vm hub has been in router mode since the beginning of these BQMs - my own ones do not have an option to open the firewall to wan pings. The april 5th chart shows what it looks like under load; the latency change is a constant increase, not spikes like it is every other time. I did a pinhole reset on the 7th - see red -  (because vm loves asking you to do those)  but it hasn't made a difference i think.

    see:

    apr 7apr 8

    I have a pair of xiaomi ax3000Ts, but the BQMs you are seeing are hitting the vm hub, so it has to be the vm kit causing it. If i run a naive speedtest off of my wifi, everything seems fine; these results are as expected considering im on the 360mbps contract or wherever it's meant to be.

    If it was related to VM's oversubscribed network or such, it wouldn't be happening as spikes or overnight, i would think to expect it to be a gradual increase to a higher steady state and then a drop down after peak time in the evenings.

    • Kath_P's avatar
      Kath_P
      Icon for Forum Team rankForum Team

      Hi wiry, 

      Thanks for taking the time to contact us via the Community. It's lovely having you on board with us in the Forums. ⭐

      We're sorry to hear you're having issues with your connection. We'd love to take a look in to things but have been unable to locate you on our systems using your forum credentials. 🙁 We will need to confirm some information with you in order for us to proceed with checks. 

      I have sent you a direct message to allow us to do this with you in a private space. Just click on the little ✉ at the top right-hand side of the page to access your inbox. :)

      Thanks,

  • wiry's avatar
    wiry
    On our wavelength

    The vm engineer that visited couldnt find anything obviously wrong with the hub, but they offered to replace my hub 3 with a hub 5, and it seems to have fixed it. My latency is now nice and consistent, thanks.



    • Kath_P's avatar
      Kath_P
      Icon for Forum Team rankForum Team

      Hi wiry, 

      Thanks for coming back and updating us on how the engineer visit went. We're happy to hear things are better now. 

      If you have any further issues, pop back and let us know. 

      Many thanks,