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Gigabit connection, unstable download speeds

Posted: July 8th, 2021, 12:25 am
by hughb
Having gone through all the recommendations of the SAB high connection speed tuning page. I'm unable to get a stable download speed from SAB above 45MBs which I have to set as a speed limit to achieve stability. If I set 100MBs for example. Downloads climb to ~80MBs for maybe 1 minute before progressively dropping slower, including below 45MBs and I'm at a loss about what to try next...

Thank you!

Re: Gigabit connection, unstable download speeds

Posted: July 8th, 2021, 1:17 am
by safihre
Have you tried upping it to say 75?
In the Status window, what numbers do you get when running the disk speed test?

Re: Gigabit connection, unstable download speeds

Posted: July 8th, 2021, 1:52 am
by hughb
I've tried but nothing above 45MBs works. The figures are...

Used cache
23.4 MB (35 articles)
System performance (Pystone)
180772 AMD Ryzen 5 2600X Six-Cor…
Download folder speed
299.9 MB/s (x:\TMP\SAB\TEMP)
Complete folder speed
308.2 MB/s (x:\TMP\SAB)
Internet Bandwidth
39.4 MB/s (315.2 Mbps)

Re: Gigabit connection, unstable download speeds

Posted: July 8th, 2021, 2:13 am
by sander
Did you see

Internet Bandwidth
39.4 MB/s (315.2 Mbps)

That's not Gigabit.


On my 400 / 400 Mbps, I get "Internet Bandwidth 55.7 MB/s (445.6 Mbps)", so you can trust SAB's measurement to get the rough figures right.

Re: Gigabit connection, unstable download speeds

Posted: July 8th, 2021, 2:34 am
by hughb
I agree, clearly that figure isn't right somehow. Speedtest dot net however gives me 800 to 900Mbit/s so there's definitely a disconnect there somehow. Also my ISP is well rated and makes regular public claims not to throttle any traffic. Do we know SAB does its sampling?

Re: Gigabit connection, unstable download speeds

Posted: July 8th, 2021, 2:46 am
by sander
Do we know SAB does its sampling?
I don't understand that.


What does https://fast.com/ tell you?

What is the ping time to your newsserver?

Code: Select all

$ ping news.eweka.nl
PING news.eweka.nl (81.171.92.205) 56(84) bytes of data.
64 bytes from 81.171.92.205 (81.171.92.205): icmp_seq=1 ttl=58 time=2.57 ms
64 bytes from 81.171.92.205 (81.171.92.205): icmp_seq=2 ttl=58 time=2.67 ms
64 bytes from 81.171.92.205 (81.171.92.205): icmp_seq=3 ttl=58 time=2.54 ms
So below 3 ms.

Re: Gigabit connection, unstable download speeds

Posted: July 8th, 2021, 6:30 pm
by hughb
Whatever the problem was, things seem to be working now.

Thanks!