I’m currently using Nextcloud 13. Being a complete beginner, I followed closely the official installations manual. So far everything is up and running. But when uploading over LAN a collection of large files (>20GB) with the latest windows client Im experiencing connection drops.
Using Netdata for monitoring I can recognize a reproduceable pattern:
The first 10GB are uploaded at almost 90MB/s.
The HD writes constant with almost no read.
Then after 10GB uploaded suddenly the HD begins to oscillate between read(40-80MB/s) and write(40-90MB/s).
This then causes high cpu load as high as 60% due to iowait. At the same time the upload drops to zero.
The server then stays in this read/write cycle for ~5-10min.
At some time later, the windows client goes into a timeout and drops.
What I have tried:
-Tested it on a second rig
-Moved nextclouddata to a ssd
The measures above did not fix my problem. Although using the SSD the read/write cycle ends faster (5min). Because I can reproduce it on different hardware, I’m thinking about a configuration error in my lamp-stack.
Is this read/write oscillation normal?
Can I somehow prevent or delay it?
Are there any obvious troubleshooting steps I should try?
Any tips/help is much appreciated. If needed I can provide logs(need to know which though).