diff --git a/cmd/prometheus/main.go b/cmd/prometheus/main.go
index a7386b01c..c0848c766 100644
--- a/cmd/prometheus/main.go
+++ b/cmd/prometheus/main.go
@@ -570,8 +570,11 @@ func main() {
 	)
 
 	if cfg.enableAutoGOMAXPROCS {
-		if _, err := maxprocs.Set(); err != nil {
-			level.Warn(logger).Log("msg", "Failed to set GOMAXPROCS automatically", "err", err)
+		l := func(format string, a ...interface{}) {
+			level.Info(logger).Log("component", "automaxprocs", "msg", fmt.Sprintf(strings.TrimPrefix(format, "maxprocs: "), a...))
+		}
+		if _, err := maxprocs.Set(maxprocs.Logger(l)); err != nil {
+			level.Warn(logger).Log("component", "automaxprocs", "msg", "Failed to set GOMAXPROCS automatically", "err", err)
 		}
 	}
 
diff --git a/docs/feature_flags.md b/docs/feature_flags.md
index f02be1be9..dfeaeb0dd 100644
--- a/docs/feature_flags.md
+++ b/docs/feature_flags.md
@@ -93,7 +93,4 @@ computed at all.
 
 `--enable-feature=auto-gomaxprocs`
 
-When enabled, GOMAXPROCS variable will be automatically set to match the container CPU limit.
-
-This means that Go runtime will operate as if it had only amount of CPU specified in the container
-CPU limit and not all CPUs on server where it's running.
+When enabled, GOMAXPROCS variable is automatically set to match Linux container CPU quota.