Slow download speeds

[mccarthyrobert8]

I'm in a bit over my head here. 

 

Recently I noticed my torrent speeds have lowered significantly. I've checked all my ports and everything seems good. I can connect to my trackers no problem and occasionally will peak at expected speeds (90 MiB/s) at the beginning of a download briefly (less than a minute) before dropping to back down to much lower speeds (fluctuating from sub 1 MiB/s to a max of around 6 MiB/s).  I have my arr suite setup to download straight to the array (this has never caused any issues and speeds would normally be acceptable and near what I limited my torrent dockers at (48 MiB/s).

I tried switching torrent dockers from rutorrent to Deluge and the same problem exists. I have tried testing with well seeded torrents and the problem persists. I've tried disabling every other docker except rutorrent/deluge, problem persists. The only thing that seems to have fixed the issue is setting up a test share that uses the cache. This gave me download speeds in the 60-70MiB/s with slight fluctuations. 

I have attached diags and screenshots of DiskSpeed results, but not sure how to interpret the results. One DiskSpeed result (_FULL) contains speed gap errors, in the other I disabled them. 

Could this be an issue with failing drives, or could my drives be slowing because they're starting to fill up? I also didn't notice this issue until I updated to 6.12.3, not sure if it could be related to that. 

 

Any help is greatly appreciated. 

tower-diagnostics-20230825-1118.zip

[mccarthyrobert8]

Is this normal, copying a file from cache to array. Very fast in the beginning and drops throughout the rest of the transfer, seems like the same behavior as the torrents.

[JorgeB]

First few GBs go to RAM, so it's faster, then it needs to wait for the disks, also most of your disks are SMR, including parity, that will limit all array writes, even to CMR disks.