PMM-9507 Better help. (#428)

* PMM-9507 Better help.

* PMM-9507 Fix.

Author: JiriCtvrtka

go.mod

@@ -21,15 +21,37 @@ require (
 )
 
 require (
+	github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 // indirect
+	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
+	github.com/alecthomas/units v0.0.0-20210208195552-ff826a37aa15 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.1 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-ole/go-ole v1.2.4 // indirect
+	github.com/go-stack/stack v1.8.0 // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/google/go-cmp v0.5.6 // indirect
+	github.com/klauspost/compress v1.13.6 // indirect
 	github.com/kr/text v0.2.0 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
 	github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/prometheus/common v0.31.1 // indirect
+	github.com/prometheus/procfs v0.6.0 // indirect
 	github.com/tklauser/go-sysconf v0.3.9 // indirect
+	github.com/tklauser/numcpus v0.3.0 // indirect
+	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
+	github.com/xdg-go/scram v1.0.2 // indirect
+	github.com/xdg-go/stringprep v1.0.2 // indirect
+	github.com/youmark/pkcs8 v0.0.0-20181117223130-1be2e3e5546d // indirect
 	golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 // indirect
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
 	golang.org/x/sys v0.0.0-20211013075003-97ac67df715c // indirect
 	golang.org/x/text v0.3.7 // indirect
 	google.golang.org/protobuf v1.27.1 // indirect
+	gopkg.in/alecthomas/kingpin.v2 v2.2.6 // indirect
 	gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
+	gopkg.in/mgo.v2 v2.0.0-20190816093944-a6b53ec6cb22 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
 )

main.go

@@ -53,7 +53,7 @@ type GlobalFlags struct {
 
 	CollectAll bool `name:"collect-all" help:"Enable all collectors. Same as specifying all --collector.<name>"`
 
-	CollStatsLimit int `name:"collector.collstats-limit" help:"Disable collstats and indexstats collector if there are more than <n> collections. 0=No limit" default:"0"`
+	CollStatsLimit int `name:"collector.collstats-limit" help:"Disable collstats, dbstat, topmetrics and indexstats collector if there are more than <n> collections. 0=No limit" default:"0"`
 
 	DiscoveringMode bool `name:"discovering-mode" help:"Enable autodiscover collections" negatable:""`
 	CompatibleMode  bool `name:"compatible-mode" help:"Enable old mongodb-exporter compatible metrics" negatable:""`