Fix proxy peering message size buckets

lib/proxy/clientmetrics.go

@@ -100,6 +100,7 @@ func newClientMetrics() (*clientMetrics, error) {
 				Subsystem: "client",
 				Name:      "message_sent_size",
 				Help:      "Size of messages sent by the client.",
+				Buckets:   messageByteBuckets,
 			},
 			[]string{"service", "handler"},
 		),
@@ -110,6 +111,7 @@ func newClientMetrics() (*clientMetrics, error) {
 				Subsystem: "client",
 				Name:      "message_received_size",
 				Help:      "Size of messages received by the client.",
+				Buckets:   messageByteBuckets,
 			},
 			[]string{"service", "handler"},
 		),

lib/proxy/reporter.go

@@ -20,6 +20,9 @@ import (
 	"github.com/prometheus/client_golang/prometheus"
 )
 
+// messageByteBuckets creates buckets ranging from 32-65536 bytes.
+var messageByteBuckets = prometheus.ExponentialBuckets(32, 2, 12)
+
 type metrics interface {
 	getConnectionGauge() *prometheus.GaugeVec
 	getRPCGauge() *prometheus.GaugeVec

lib/proxy/servermetrics.go

@@ -80,6 +80,7 @@ func newServerMetrics() (*serverMetrics, error) {
 				Subsystem: "server",
 				Name:      "message_sent_size",
 				Help:      "Size of messages sent by the server.",
+				Buckets:   messageByteBuckets,
 			},
 			[]string{"service", "handler"},
 		),
@@ -90,6 +91,7 @@ func newServerMetrics() (*serverMetrics, error) {
 				Subsystem: "server",
 				Name:      "message_received_size",
 				Help:      "Size of messages received by the server.",
+				Buckets:   messageByteBuckets,
 			},
 			[]string{"service", "handler"},
 		),