~$ curl -s 'http://localhost:9090/metrics' | grep ^[^#] | \
   grep ^prometheus_ | head
prometheus_api_remote_read_queries 0
prometheus_build_info{branch="HEAD",goversion="go1.13.5",
   revision="d9613e5c466c6e9de548c4dae1b9aabf9aaf7c57",version="2.54.1"} 1
prometheus_config_last_reload_success_timestamp_seconds 
   1.5799745775809295e+09
prometheus_config_last_reload_successful 1
prometheus_engine_queries 0
prometheus_engine_queries_concurrent_max 20
prometheus_engine_query_duration_seconds{slice="inner_eval",quantile="0.5"}
   NaN
prometheus_engine_query_duration_seconds{slice="inner_eval",quantile="0.9"}
   NaN
prometheus_engine_query_duration_seconds{slice="inner_eval",quantile="0.99"}
    NaN
prometheus_engine_query_duration_seconds_sum{slice="inner_eval"} 8.479e-06
 
~$ curl -s 'http://localhost:9090/metrics' | grep ^[^#] | grep ^go_ | \
   head
go_gc_cycles_automatic_gc_cycles_total 308
go_gc_cycles_forced_gc_cycles_total 0
go_gc_cycles_total_gc_cycles_total 308
go_gc_duration_seconds{quantile="0"} 0.000106962
go_gc_duration_seconds{quantile="0.25"} 0.000209701
go_gc_duration_seconds{quantile="0.5"} 0.000235832
go_gc_duration_seconds{quantile="0.75"} 0.00027725
go_gc_duration_seconds{quantile="1"} 0.021953571
go_gc_duration_seconds_sum 0.138078084
go_gc_duration_seconds_count 308
