I have a SG VPS with roughly 1Gbps upload & download, and this is confirmed through speedtest-cli to multiple server, and my ISP's max download speed is 20Mbps
However me and other users facing a very slow download speed (when downloading a file from the server). After some investigation, I found a weird upload speed behavior on my server.
The scenario is:
- Start downloading one file, the speed is 2MBps+ (My ISP's max download speed)
- Cancelled the download, and redownload again, now the speed goes down to 500-700KBps
- Added one more download (now downloading 2 files at the same time), 2nd download speed is 500-700KBps too, and doesn't seem to affect the 1st download speed (now only around 1.5MBps in total)
- Added one more download (now downloading 3 files at the same time), the 3rd download speed is 1.5MBps and seems to affect the first and second download speed a bit (now 2MBps+ in total which is the expected max speed)
Take a look at the demonstration video here: https://youtu.be/PIX8JitRX98
Regarding the 1st and 2nd scenario, every time I started a new download from my server to my local address, I got small chance (about one in ten) to have a full speed (2MBps+) and it will never go down to 500-700KBps, but if I restart the download, the speed immediately goes down to 500-700KBps again. Take a look of the video I uploaded here: https://youtu.be/qsTaeLUIWWQ . Looks like the speed is changing every time I start a new download
What I have tried:
- Using VPN (private internet access) with many different region
- Tried 3 different ISP
- Asked my other friends who lives in the same country as me with different ISP
and all of them are facing the same issue
MTR / Tracert from local PC to the server and vice versa shows good latency
