diff --git a/src/mgr/OSDPerfMetricTypes.cc b/src/mgr/OSDPerfMetricTypes.cc
index 3d842edc163..06f7081d9aa 100644
--- a/src/mgr/OSDPerfMetricTypes.cc
+++ b/src/mgr/OSDPerfMetricTypes.cc
@@ -46,10 +46,10 @@ void PerformanceCounterDescriptor::pack_counter(const PerformanceCounter &c,
   case PerformanceCounterType::OPS:
   case PerformanceCounterType::WRITE_OPS:
   case PerformanceCounterType::READ_OPS:
-    break;
   case PerformanceCounterType::BYTES:
   case PerformanceCounterType::WRITE_BYTES:
   case PerformanceCounterType::READ_BYTES:
+    break;
   case PerformanceCounterType::LATENCY:
   case PerformanceCounterType::WRITE_LATENCY:
   case PerformanceCounterType::READ_LATENCY:
@@ -68,10 +68,10 @@ void PerformanceCounterDescriptor::unpack_counter(
   case PerformanceCounterType::OPS:
   case PerformanceCounterType::WRITE_OPS:
   case PerformanceCounterType::READ_OPS:
-    break;
   case PerformanceCounterType::BYTES:
   case PerformanceCounterType::WRITE_BYTES:
   case PerformanceCounterType::READ_BYTES:
+    break;
   case PerformanceCounterType::LATENCY:
   case PerformanceCounterType::WRITE_LATENCY:
   case PerformanceCounterType::READ_LATENCY:
diff --git a/src/osd/DynamicPerfStats.h b/src/osd/DynamicPerfStats.h
index 694632c01eb..e88b21c9dd0 100644
--- a/src/osd/DynamicPerfStats.h
+++ b/src/osd/DynamicPerfStats.h
@@ -78,18 +78,15 @@ public:
             return;
           case PerformanceCounterType::BYTES:
             c->first += inb + outb;
-            c->second++;
             return;
           case PerformanceCounterType::WRITE_BYTES:
             if (op.may_write() || op.may_cache()) {
               c->first += inb;
-              c->second++;
             }
             return;
           case PerformanceCounterType::READ_BYTES:
             if (op.may_read()) {
               c->first += outb;
-              c->second++;
             }
             return;
           case PerformanceCounterType::LATENCY:
diff --git a/src/pybind/mgr/prometheus/module.py b/src/pybind/mgr/prometheus/module.py
index 50eb1debf87..5487849e157 100644
--- a/src/pybind/mgr/prometheus/module.py
+++ b/src/pybind/mgr/prometheus/module.py
@@ -182,9 +182,9 @@ class Module(MgrModule):
                                'desc' : 'RBD image writes count'},
                 'read_ops' : {'type' : self.PERFCOUNTER_COUNTER,
                               'desc' : 'RBD image reads count'},
-                'write_bytes' : {'type' : self.PERFCOUNTER_LONGRUNAVG,
+                'write_bytes' : {'type' : self.PERFCOUNTER_COUNTER,
                                  'desc' : 'RBD image bytes written'},
-                'read_bytes' : {'type' : self.PERFCOUNTER_LONGRUNAVG,
+                'read_bytes' : {'type' : self.PERFCOUNTER_COUNTER,
                                 'desc' : 'RBD image bytes read'},
                 'write_latency' : {'type' : self.PERFCOUNTER_LONGRUNAVG,
                                    'desc' : 'RBD image writes latency (msec)'},