diff --git a/sample-config/pgmon-metrics.yml b/sample-config/pgmon-metrics.yml
index 00f7e41..3c8e465 100644
--- a/sample-config/pgmon-metrics.yml
+++ b/sample-config/pgmon-metrics.yml
@@ -91,20 +91,20 @@ metrics:
     query:
       160000: >
         SELECT backend_type,
-               COALESCE(SUM(reads), 0) AS reads,
-               COALESCE(SUM(read_time), 0) AS read_time,
-               COALESCE(SUM(writes), 0) AS writes,
-               COALESCE(SUM(write_time), 0) AS write_time,
-               COALESCE(SUM(writebacks), 0) AS writebacks,
-               COALESCE(SUM(writeback_time), 0) AS writeback_time,
-               COALESCE(SUM(extends), 0) AS extends,
-               COALESCE(SUM(extend_time), 0) AS extend_time,
-               COALESCE(SUM(op_bytes), 0) AS op_bytes,
-               COALESCE(SUM(hits), 0) AS hits,
-               COALESCE(SUM(evictions), 0) AS evictions,
-               COALESCE(SUM(reuses), 0) AS reuses,
-               COALESCE(SUM(fsyncs), 0) AS fsyncs,
-               COALESCE(SUM(fsync_time), 0) AS fsync_time
+               COALESCE(SUM(reads * op_bytes), 0)::bigint AS reads,
+               COALESCE(SUM(read_time), 0)::bigint AS read_time,
+               COALESCE(SUM(writes * op_bytes), 0)::bigint AS writes,
+               COALESCE(SUM(write_time), 0)::bigint AS write_time,
+               COALESCE(SUM(writebacks * op_bytes), 0)::bigint AS writebacks,
+               COALESCE(SUM(writeback_time), 0)::bigint AS writeback_time,
+               COALESCE(SUM(extends * op_bytes), 0)::bigint AS extends,
+               COALESCE(SUM(extend_time), 0)::bigint AS extend_time,
+               COALESCE(SUM(op_bytes), 0)::bigint AS op_bytes,
+               COALESCE(SUM(hits), 0)::bigint AS hits,
+               COALESCE(SUM(evictions), 0)::bigint AS evictions,
+               COALESCE(SUM(reuses), 0)::bigint AS reuses,
+               COALESCE(SUM(fsyncs), 0)::bigint AS fsyncs,
+               COALESCE(SUM(fsync_time), 0)::bigint AS fsync_time
         FROM pg_stat_io
         GROUP BY backend_type
 
diff --git a/zabbix_templates/pgmon_templates.yaml b/zabbix_templates/pgmon_templates.yaml
index 19a8ee9..997e1fa 100644
--- a/zabbix_templates/pgmon_templates.yaml
+++ b/zabbix_templates/pgmon_templates.yaml
@@ -924,6 +924,7 @@ zabbix_export:
               type: DEPENDENT
               key: 'pgmon_io_backend[extends,{#BACKEND_TYPE}]'
               delay: '0'
+              units: B
               preprocessing:
                 - type: JSONPATH
                   parameters:
@@ -978,6 +979,7 @@ zabbix_export:
               type: DEPENDENT
               key: 'pgmon_io_backend[reads,{#BACKEND_TYPE}]'
               delay: '0'
+              units: B
               preprocessing:
                 - type: JSONPATH
                   parameters:
@@ -1014,6 +1016,7 @@ zabbix_export:
               type: DEPENDENT
               key: 'pgmon_io_backend[writebacks,{#BACKEND_TYPE}]'
               delay: '0'
+              units: B
               preprocessing:
                 - type: JSONPATH
                   parameters:
@@ -1032,6 +1035,7 @@ zabbix_export:
               type: DEPENDENT
               key: 'pgmon_io_backend[writes,{#BACKEND_TYPE}]'
               delay: '0'
+              units: B
               preprocessing:
                 - type: JSONPATH
                   parameters:
@@ -1082,6 +1086,7 @@ zabbix_export:
               type: CALCULATED
               key: 'pgmon_io_backend_delta[extends,1h,{#BACKEND_TYPE}]'
               delay: 10m
+              units: B/h
               params: 'last(//pgmon_io_backend[extends,{#BACKEND_TYPE}]) - last(//pgmon_io_backend[extends,{#BACKEND_TYPE}], #1:now-1h)'
               tags:
                 - tag: Application
@@ -1096,6 +1101,7 @@ zabbix_export:
               key: 'pgmon_io_backend_delta[extends,{#BACKEND_TYPE}]'
               delay: '0'
               value_type: FLOAT
+              units: Bps
               preprocessing:
                 - type: CHANGE_PER_SECOND
                   parameters:
@@ -1178,6 +1184,7 @@ zabbix_export:
               type: CALCULATED
               key: 'pgmon_io_backend_delta[reads,1h,{#BACKEND_TYPE}]'
               delay: 10m
+              units: B/h
               params: 'last(//pgmon_io_backend[reads,{#BACKEND_TYPE}]) - last(//pgmon_io_backend[reads,{#BACKEND_TYPE}], #1:now-1h)'
               tags:
                 - tag: Application
@@ -1192,6 +1199,7 @@ zabbix_export:
               key: 'pgmon_io_backend_delta[reads,{#BACKEND_TYPE}]'
               delay: '0'
               value_type: FLOAT
+              units: Bps
               preprocessing:
                 - type: CHANGE_PER_SECOND
                   parameters:
@@ -1242,6 +1250,7 @@ zabbix_export:
               type: CALCULATED
               key: 'pgmon_io_backend_delta[writebacks,1h,{#BACKEND_TYPE}]'
               delay: 10m
+              units: B/h
               params: 'last(//pgmon_io_backend[writebacks,{#BACKEND_TYPE}]) - last(//pgmon_io_backend[writebacks,{#BACKEND_TYPE}], #1:now-1h)'
               tags:
                 - tag: Application
@@ -1256,6 +1265,7 @@ zabbix_export:
               key: 'pgmon_io_backend_delta[writebacks,{#BACKEND_TYPE}]'
               delay: '0'
               value_type: FLOAT
+              units: Bps
               preprocessing:
                 - type: CHANGE_PER_SECOND
                   parameters:
@@ -1274,6 +1284,7 @@ zabbix_export:
               type: CALCULATED
               key: 'pgmon_io_backend_delta[writes,1h,{#BACKEND_TYPE}]'
               delay: 10m
+              units: B/h
               params: 'last(//pgmon_io_backend[writes,{#BACKEND_TYPE}]) - last(//pgmon_io_backend[writes,{#BACKEND_TYPE}], #1:now-1h)'
               tags:
                 - tag: Application
@@ -1288,6 +1299,7 @@ zabbix_export:
               key: 'pgmon_io_backend_delta[writes,{#BACKEND_TYPE}]'
               delay: '0'
               value_type: FLOAT
+              units: Bps
               preprocessing:
                 - type: CHANGE_PER_SECOND
                   parameters:
@@ -1302,10 +1314,11 @@ zabbix_export:
                 - tag: Component
                   value: IO
           graph_prototypes:
-            - uuid: a1d95bcb43624c4abdfcb4aeb7d7d2b0
+            - uuid: faf1e3f41dd84adba42c414f6efac152
               name: 'Backend I/O for {#BACKEND_TYPE}'
               graph_items:
                 - color: 199C0D
+                  yaxisside: RIGHT
                   calc_fnc: ALL
                   item:
                     host: 'PostgreSQL by pgmon'
@@ -1318,12 +1331,14 @@ zabbix_export:
                     key: 'pgmon_io_backend[extends,{#BACKEND_TYPE}]'
                 - sortorder: '2'
                   color: 2774A4
+                  yaxisside: RIGHT
                   calc_fnc: ALL
                   item:
                     host: 'PostgreSQL by pgmon'
                     key: 'pgmon_io_backend[fsyncs,{#BACKEND_TYPE}]'
                 - sortorder: '3'
                   color: F7941D
+                  yaxisside: RIGHT
                   calc_fnc: ALL
                   item:
                     host: 'PostgreSQL by pgmon'
@@ -1336,6 +1351,7 @@ zabbix_export:
                     key: 'pgmon_io_backend[reads,{#BACKEND_TYPE}]'
                 - sortorder: '5'
                   color: 6C59DC
+                  yaxisside: RIGHT
                   calc_fnc: ALL
                   item:
                     host: 'PostgreSQL by pgmon'
@@ -1356,6 +1372,7 @@ zabbix_export:
               name: 'Backend I/O for {#BACKEND_TYPE} - 1h delta'
               graph_items:
                 - color: 199C0D
+                  yaxisside: RIGHT
                   calc_fnc: ALL
                   item:
                     host: 'PostgreSQL by pgmon'
@@ -1368,12 +1385,14 @@ zabbix_export:
                     key: 'pgmon_io_backend_delta[extends,1h,{#BACKEND_TYPE}]'
                 - sortorder: '2'
                   color: 2774A4
+                  yaxisside: RIGHT
                   calc_fnc: ALL
                   item:
                     host: 'PostgreSQL by pgmon'
                     key: 'pgmon_io_backend_delta[fsyncs,1h,{#BACKEND_TYPE}]'
                 - sortorder: '3'
                   color: F7941D
+                  yaxisside: RIGHT
                   calc_fnc: ALL
                   item:
                     host: 'PostgreSQL by pgmon'
@@ -1386,6 +1405,7 @@ zabbix_export:
                     key: 'pgmon_io_backend_delta[reads,1h,{#BACKEND_TYPE}]'
                 - sortorder: '5'
                   color: 6C59DC
+                  yaxisside: RIGHT
                   calc_fnc: ALL
                   item:
                     host: 'PostgreSQL by pgmon'
@@ -1406,6 +1426,7 @@ zabbix_export:
               name: 'Backend I/O Rates for {#BACKEND_TYPE}'
               graph_items:
                 - color: 199C0D
+                  yaxisside: RIGHT
                   calc_fnc: ALL
                   item:
                     host: 'PostgreSQL by pgmon'
@@ -1418,12 +1439,14 @@ zabbix_export:
                     key: 'pgmon_io_backend_delta[extends,{#BACKEND_TYPE}]'
                 - sortorder: '2'
                   color: 2774A4
+                  yaxisside: RIGHT
                   calc_fnc: ALL
                   item:
                     host: 'PostgreSQL by pgmon'
                     key: 'pgmon_io_backend_delta[fsyncs,{#BACKEND_TYPE}]'
                 - sortorder: '3'
                   color: F7941D
+                  yaxisside: RIGHT
                   calc_fnc: ALL
                   item:
                     host: 'PostgreSQL by pgmon'
@@ -1436,6 +1459,7 @@ zabbix_export:
                     key: 'pgmon_io_backend_delta[reads,{#BACKEND_TYPE}]'
                 - sortorder: '5'
                   color: 6C59DC
+                  yaxisside: RIGHT
                   calc_fnc: ALL
                   item:
                     host: 'PostgreSQL by pgmon'