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by sladflob
Wed Jan 08, 2020 2:32 am
Forum: Troubleshooting
Topic: Sudden drop in network speed
Replies: 17
Views: 1892

Re: Sudden drop in network speed

Just to add more information... I disabled sabnzbd and wrote a bash script to repeatedly download a file from my local network using curl via ftp. I rebooted the pi and ran the script and it was downloading happily at about 100 MB/s for about two days. I checked it last night and it was still going ...
by sladflob
Thu Jan 02, 2020 7:45 am
Forum: Troubleshooting
Topic: Sudden drop in network speed
Replies: 17
Views: 1892

Re: Sudden drop in network speed

I assume you're tested using another cable/port on your ethernet switch? Yes, have tried that, and also tried bypassing the switch and plugging directly into the router. I left it for a few days to see if it got better but if anything it got worse. Downloads slowed down to around 240 KB/s. In the e...
by sladflob
Mon Dec 30, 2019 11:21 pm
Forum: Troubleshooting
Topic: Sudden drop in network speed
Replies: 17
Views: 1892

Re: Sudden drop in network speed

SABnzbd Would be my prime suspect. Try suspending the use of that thing, reboot, and see if performance slows down over time. I don’t think an intermittent hardware issue with Ethernet is possible. It's not just sabnzbd - when it's in the "slow state", FTP transfers over my local network are also a...
by sladflob
Mon Dec 30, 2019 1:14 am
Forum: Troubleshooting
Topic: Sudden drop in network speed
Replies: 17
Views: 1892

Re: Sudden drop in network speed

Hi everyone, I'm resuscitating this thread because I'm still having problems with my Pi's network speed suddenly dropping. Since my last post I've been away for a while so didn't use the Pi, but since returning I fired it up again and within a couple of days I'm now back in the "slow" state again. A...
by sladflob
Thu Nov 07, 2019 12:36 am
Forum: Troubleshooting
Topic: Sudden drop in network speed
Replies: 17
Views: 1892

Re: Sudden drop in network speed

Out of RAM? Too many open connections/files? Given the use you make of the machine, I would just leave it at that and have cron reboot it every day. Rebooting daily is not really a solution - I'd like to get to the bottom of what's going on. I'm fairly certain it has nothing to do with sabnzbd per ...
by sladflob
Tue Nov 05, 2019 12:15 am
Forum: Troubleshooting
Topic: Sudden drop in network speed
Replies: 17
Views: 1892

Re: Sudden drop in network speed

The downloads are from a remote Usenet server controlled via the web interface to SABnzbd. But I don't think there's anything special about the downloads that is causing the problem. Sometimes the Pi has been idle for a few days and when I come back to it I find that it has gone into slow mode. Once...
by sladflob
Mon Nov 04, 2019 1:23 pm
Forum: Troubleshooting
Topic: Sudden drop in network speed
Replies: 17
Views: 1892

Re: Sudden drop in network speed

The output of smartctl says that the device lacks SMART capability, so that doesn't sound too useful. It's pretty much a brand new drive, I bought it when I got the Pi 4.
by sladflob
Mon Nov 04, 2019 1:17 pm
Forum: Troubleshooting
Topic: Sudden drop in network speed
Replies: 17
Views: 1892

Re: Sudden drop in network speed

Hi, I managed to narrow down the time period where the slowdown occurred to a window of a few minutes (I was downloading some files - one download was fast, the next one was slow) and unfortunately there doesn't seem to be anything in the syslog for that time period. I also looked in /var/log messag...
by sladflob
Mon Nov 04, 2019 6:16 am
Forum: Troubleshooting
Topic: Sudden drop in network speed
Replies: 17
Views: 1892

Re: Sudden drop in network speed

Does speed drop over the local network as well? Good question. I was fortunate to have the Pi in "slow mode" so tried doing a file transfer using FTP from my Synology NAS. In slow mode, the Pi was, at best, able to achieve about 4 MB/s. I rebooted the Pi and tried again and it downloaded the same f...
by sladflob
Sun Nov 03, 2019 1:41 am
Forum: Troubleshooting
Topic: Sudden drop in network speed
Replies: 17
Views: 1892

Sudden drop in network speed

I've had a Pi 4 for a while now and have been experimenting with using it as a NAS/download box. It is currently running Raspbian. I've noticed that after some indeterminate period of time (sometimes weeks, sometimes days) the download speeds achieved by the box drop quite drastically and stay that ...

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