v21 on RPI4 suddenly crashing

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ProXy
Posts: 22
Joined: 27 Oct 2019, 09:50

Re: v21 on RPI4 suddenly crashing

Post by ProXy » 25 Dec 2020, 07:43

Hello sanderj,

I am indeed using DirectUnpack because the rpi isn't the fatests machine when unpacking bigger files (50GB+). In the partical case it was a 90GB download with rars splitted to 1000MB.

I am using dietpi as OS and by default swapping is disabled. So I enabled swapping to the hdd with a maximum size of 8GB and will give it a retry. Not sure what free -m shows with this particular download, but it looks fine when doing others downloads:

Code: Select all

              total        used        free      shared  buff/cache   available
Mem:           3877         318        1780          29        1779        3383
Swap:          8191           0        8191

sanderj
Posts: 178
Joined: 10 Feb 2014, 21:46

Re: v21 on RPI4 suddenly crashing

Post by sanderj » 25 Dec 2020, 08:04

a 90GB download on a Raspi4? I pity your Raspis' ARM processor ... ;)

OK, you now have swap on. Good. The free -m shows

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              total        used        free      shared  buff/cache   available
Mem:           3877         318        1780          29        1779        3383
Swap:          8191           0        8191
It shows:
You have (about) 4GB of RAM, of which 1.78 GB is free. Good
You have 8GB of swap (good), of which nothing is used at this moment.

While nzbget is running, now and then check output of "free -m". Bad signal: Mem -> free becomes 0. And/or swap -> free goes to 0


EDIT: swapping to a SD card is not great: swapping itself is slow, and in the long term not good for you SD card. But it does avoid a Out-of-Memory, so good as a test. Maybe read https://www.howtoforge.com/tutorial/linux-swappiness/ how to reduce swapping to your SD card.

ProXy
Posts: 22
Joined: 27 Oct 2019, 09:50

Re: v21 on RPI4 suddenly crashing

Post by ProXy » 25 Dec 2020, 08:40

I am swapping to an external 3.5 hard drive to reduce SD writing to a minimum.

The rpi4 handles even those huge downloads fairly well when direct unpack is possible, because my download speed is quite low.

Code: Select all

Statistics:
Downloaded size: 92.03 GB
Average download speed: 3.56 MB/s
Total time: 7:23:01
Download time: 7:21:39
Verification time: 0:00:00
Repair time: 0:00:00
Unpack time: 0:00:25
Not bad for this little machine. :)

rpi4usenetlad
Posts: 2
Joined: 25 Dec 2020, 15:44

Re: v21 on RPI4 suddenly crashing

Post by rpi4usenetlad » 25 Dec 2020, 15:58

How's your system load? what tweaks have you done?
Sorry, using an RPI4 4gb myself and struggling.

ProXy
Posts: 22
Joined: 27 Oct 2019, 09:50

Re: v21 on RPI4 suddenly crashing

Post by ProXy » 25 Dec 2020, 19:50

Hello rpi4usenetlad,

I am running dietpi, all userdata is on a external 3.5 drive. NZBGet can be installed using the dietpi-software manager with some tweaks for better performance on a rpi4. I just modified some of the settings, because 4GB of memory allow some further improvements. What are struggling with?

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