How to find out if there are IOPS limits on a vps server?

Question

Debian

I bought a VPS for decent money, an international office on the market since 1997.
They promised a 120Gb SSD drive, the site works like a rocket.
But I wanted to make sure that there was an SSD there,
dd if=/dev/vda of=/dev/null bs=8M count=1000
I ran the command: The command took a long time and gave me 8 mb / s at the output. I
thought it was a glitch, I started it again, it gave out 7 mb / s.
I don’t think that such an office will deceive its customers, most likely IOPS limits, but how can you be sure of this?

Answer 1

Were you explicitly promised guaranteed iops?
On the same physical server, in addition to yours, there may be a bunch of vds that are actively eating up resources.
If you want guaranteed performance - rent iron servers, since the prices are now more than humane.

Answer 2

Iops and latency can be measured using the fio utility. It guarantees real results.

Answer 3

Well, look at the iops during the test, most likely they just cut the speed of the disk, since the cat cried jops there