I came here to seek for advice. I went through other threads on slow/sluggish performance, but I could not find anything useful. I was running Unraid on HP Proliant server with Sandisk USB flash drive, and it was slow especially when doing things such as downloading/updating dockers, where you would spend ages on the screen showing progress. Or when installing MariaDB for instance, initial run took like 5 minutes. Same with some other dockers (nextcloud). 

I recently moved to new server (Intel® Core™ i5-14500, 64GB of RAM, disks stayed the same, but I have replaced my flash drive) hoping for improvement, but there is no difference. I maintain few other servers that are "worse" specs-wise, so I know this is not common thing. I would appreciate any suggestion.

tower-diagnostics-20240304-1456.zip

I am starting to suspecting my cache or something around it. I downloaded diskspeed - not to test disks, just to compare how long does it take to install it. On my other server, it takes 26 seconds. On this one here, 2:30 (2 minutes, 30 seconds). While downloading is comparably fast, it is extracting that takes long. Also, while it is ongoing, I am unable to open unraid in other tab - it just loads, like it is busy.

I would rule out pc/cpu etc. as this has been replaced. But disks are the same.

Seems like i found my issue - one of my cache drives in pool (Samsung 870 QVO) is having issues which results in very low and unstable read/write speeds. Initally I removed the pool and kept only Samsung as cache. Performance was ever worse. Then I changed cache drive to Apacer AS350 only, and it is flying now. It is still covered by warranty so I am going to submit it back to seller under warranty.