Signed-off-by: Pavel Pogodaev <p.pogodaev@yadro.com>

@@ -1067,0 +1077,4 @@
+
+	samplingCore := zapcore.NewSamplerWithOptions(
+		l.Core(),
+		time.Second,

@@ -82,1 +81,3 @@
-	cfgLoggerDestination = "logger.destination"
+	cfgLoggerLevel              = "logger.level"
+	cfgLoggerDestination        = "logger.destination"
+	cfgLoggerSamplingInitial    = "logger.sampling.initial"

@@ -787,6 +794,10 @@ func newSettings() *viper.Viper {
 	// logger:
 	v.SetDefault(cfgLoggerLevel, "debug")
 	v.SetDefault(cfgLoggerDestination, "stdout")
+	v.SetDefault(cfgLoggerSamplingEnabled, true)

@@ -1067,0 +1082,4 @@
+	// are recorded in a one-second interval. Every other log entry will be dropped within the interval since
+	// cfgLoggerSamplingThereafter is specified here.
+
+	if v.GetBool(cfgLoggerSamplingEnabled) {

@@ -1033,3 +1044,3 @@
-		return newStdoutLogger(lvl)
+		return newStdoutLogger(v, lvl)
 	case destinationJournald:
 		return newJournaldLogger(lvl)

@@ -1067,0 +1091,4 @@
+		)
+
+		l = zap.New(samplingCore)
+	}

@@ -58,0 +58,4 @@
+  sampling:
+    enabled: true
+    initial: 100
+    thereafter: 100

@@ -371,2 +371,4 @@
   level: debug
   destination: stdout
+  sampling:
+    initial: 100

@@ -1077,1 +1098,3 @@
-	c.Level = zap.NewAtomicLevelAt(lvl)
+func newJournaldLogger(v *viper.Viper, lvl zapcore.Level) *Logger {
+	c := zap.NewProductionEncoderConfig()
+	c.EncodeTime = zapcore.ISO8601TimeEncoder

@@ -371,2 +371,4 @@
   level: debug
   destination: stdout
+  sampling:
+`    enabled: false 

@@ -1058,2 +1067,2 @@
-	c.Encoding = "console"
-	c.EncoderConfig.EncodeTime = zapcore.ISO8601TimeEncoder
+func newStdoutLogger(v *viper.Viper, lvl zapcore.Level) *Logger {
+	stdout := zapcore.AddSync(os.Stdout)

@@ -1085,3 +1102,4 @@
 		zapjournald.SyslogPid(),
 	})
 
+	if v.GetBool(cfgLoggerSamplingEnabled) {

@@ -1096,0 +1125,4 @@
+
+	encoder := zapcore.NewConsoleEncoder(c)
+
+	return encoder