This is what my grafana dashboard looks like:
I deployed it as docker image first, the uncontinuously lines came out and I thought it may be the heavy load.
Then I tried to deploy it to ESXi virtual machine and increased the CPUs&Mem, the same happened.
At the end, I run in VirtualBox, everything is perfect, the graph seems continuously.
Then I realized that my docker host is a ESXi vm. So I get to this conclusion: PMM-Server does not work well with vmware machines.
Could someone help me what have I miss ?