In reply to a post by PCJM40:

Sorry Max, I honestly thought I was helping but based on below comment you made today I won't say anything more about this.

I am getting sick of tired with some bloke from think broadband forum suggest my full fibre isn't great at all due to BQM spiked and too high latency. But I think it down to TTB server. Not my connection at all.

The speed was fine but getting sick of tired about spiked 160ms on FTTP. I think I have to raised this with Martin, Aquiss to see what he say about this. But, If he says this is normal, then that's is fine by me.

Right I just forced myself to downloading all 9 x ISO from Microsoft server at the same time starting downloading at 12:01pm and all downloading completed at 12:11pm. To see how much spiked using FTTP from Aquiss.

https://i.ibb.co/XZymzWYV/Screenshot-from-2026-01-15...

https://i.ibb.co/zWF65hQc/Screenshot-from-2026-01-15...

Best to check it at 12:01pm to 12:11pm Live BQM: https://www.thinkbroadband.com/broadband/monitoring/...

In reply to a post by adslmax:

In reply to a post by PCJM40:

Sorry Max, I honestly thought I was helping but based on below comment you made today I won't say anything more about this.

I am getting sick of tired with some bloke from think broadband forum suggest my full fibre isn't great at all due to BQM spiked and too high latency. But I think it down to TTB server. Not my connection at all.

The speed was fine but getting sick of tired about spiked 160ms on FTTP. I think I have to raised this with Martin, Aquiss to see what he say about this. But, If he says this is normal, then that's is fine by me.

You have had spiking on 3 different platforms from the graphs presented. Do what others have suggested and do a device removal untill you find out whats causing it. Or just live with it.

160ms isn't a problem unless you are gaming .......

In reply to a post by Taras:

You have had spiking on 3 different platforms from the graphs presented. Do what others have suggested and do a device removal untill you find out whats causing it. Or just live with it.

160ms isn't a problem unless you are gaming .......

Ok I will removed from all devices. All WiFi disabled. Just 2.5Gbps to PC only. nothing else. Do you think Cat5e caused it from Router to PC or change to Cat6e? I have to do it later because my daughter is on her xbox gaming.

Edited by adslmax (Thu 15-Jan-26 12:36:13)

I have now disabled all wireless on the router just one ethernet from 2.5Gbps to my pc with no other devices now just my pc See if there is no more spiked on BQM live.

Pretty stupid of TP LInk when disabled all WiFi it want to rebooting the router to take affect. Blimey!

Edited by adslmax (Thu 15-Jan-26 13:06:26)

Seem make no different, can see spiked again 160ms. I don't understand why and what caused it? Is it to do with bad router? or bad ONT? or bad network gateway?

I think PCJM40 might be correct there. The speed are spot on but the latency on upload is really bad one rather than download latency

https://i.ibb.co/HTXzKBgr/18719371786.png (you can see download latency 15ms is fine but upload latency is pretty high at 96ms) as someone at Plusnet upload was spot on perfectly at 9ms see below:
https://i.ibb.co/sLCPSPq/fv8z0dv-md.jpg

I can't see the pictures sadly.. your G.fast connection is showing 120ms latency. Your pn connection is showing 80ms connection.

Whilst the latency is noticable on a graph, its only 0.16s in reality and will only matter on realtime applications where you can't resend a packet (ie media).

check the xbox usage - it gives hourly breakdown on bandwidith useage..

https://www.reddit.com/r/XboxSupport/comments/1jquhj...


what you want to see xbox usage in the same hourly frame as the latency spikes - esp at night.

My guess is that given this is a one day snapshot, and that xbox does reguarly updates itself, i think that might be the issue.

also to add, latency induced by the browser; be firefox, chrome or safari is a thing.

Any browser can consume high cpu usage and or ram usage, that in a low ram or underpowered cpu system, can cause latency in the browser which wouldn't be seen via terminal during the same peroid.

is there more than one games console(or pc) being used in your household?

In reply to a post by adslmax:

https://i.ibb.co/HTXzKBgr/18719371786.png (you can see download latency 15ms is fine but upload latency is pretty high at 96ms) as someone at Plusnet upload was spot on perfectly at 9ms see below:
https://i.ibb.co/sLCPSPq/fv8z0dv-md.jpg

(Those image links don't work for me)

There's isn't really any such thing as "upload latency" or "download latency"; in any case, both are round-trip times.

What I believe you're saying is, you're seeing latency peaks during uploads and downloads. That's to be expected: you're saturating the link in one direction or the other. Queues of packets are building up, and so any latency test probles (e.g. pings) are having to sit behind all those other packets in the queue and wait their turn to be transmitted. The colloquial term for this behaviour is "buffer bloat".

It's easier to fill the packet queues in the upload direction, since your upload speed is 1/10th of your download speed; the queues empty 10 times more slowly. That's why you notice it more.

Generally, it's not a problem, it is normal behaviour. However, if you want to "improve" this, what you can do is to limit the upload speed on your router to say 95% of your upstream bandwidth, so there's always a small amount free, and configure fair queueing so that small flows can queue-jump the large flows.

You need a good router to do that. On my Mikrotik I use:

Text
1 23 4	/queue type add kind=sfq name=sfq-default sfq-perturb=10/queue simple add dst=pppoe-out2 max-limit=50M/330M name=nuc1 queue=sfq-default/default target=10.12.0.0/16,XXXX:XXXX:XXXX:XX00::/56

(where those IPs are the LAN-side IPs on my network). My actual measured upload speed is 52M, so 50M is just below this. sfq = stochastic fairness queuing. The gory details are here.

The result is I get (very slightly) better performance on interactive SSH sessions, if there is a heavy upload going on. The trade-off is that the heavy uploads take slightly longer to complete.

Is this worth it for normal users? Very likely not. But I hope it helps you understand what you're observing. It's not a problem with your equipment or your ISP.