how to collect system info with pgmetrics

[shawn0915]

dear team,
when I read doc about pgmetrics, I find pgmetrics can collect system info, like cpu/memory load and disk usage,
but I can't find any tip in the help list, or command demo in the doc,

• https://pgmetrics.io/docs/metrics.html -- System-level Information

my env:

$ cat /etc/redhat-release
CentOS Linux release 7.9.2009 (Core)

$ pgmetrics -V
pgmetrics 1.15.0

could you add more info on it?

[shawn0915]

oh, when I run pg with docker, pgmetrics can NOT collect system info, but install with RPM in the linux, then it works.