diff --git a/conf/grafana/dashboards/task-processing.json b/conf/grafana/dashboards/task-processing.json
new file mode 100644
index 0000000..a1cc4b1
--- /dev/null
+++ b/conf/grafana/dashboards/task-processing.json
@@ -0,0 +1,373 @@
+{
+  "annotations": {
+    "list": [
+      {
+        "builtIn": 1,
+        "datasource": "-- Grafana --",
+        "enable": true,
+        "hide": true,
+        "iconColor": "rgba(0, 211, 255, 1)",
+        "name": "Annotations & Alerts",
+        "type": "dashboard"
+      }
+    ]
+  },
+  "editable": true,
+  "gnetId": null,
+  "graphTooltip": 2,
+  "id": 18,
+  "iteration": 1551112370226,
+  "links": [],
+  "panels": [
+    {
+      "aliasColors": {},
+      "bars": false,
+      "dashLength": 10,
+      "dashes": false,
+      "fill": 1,
+      "gridPos": {
+        "h": 9,
+        "w": 24,
+        "x": 0,
+        "y": 0
+      },
+      "id": 4,
+      "legend": {
+        "alignAsTable": true,
+        "avg": false,
+        "current": true,
+        "hideEmpty": true,
+        "hideZero": true,
+        "max": true,
+        "min": true,
+        "rightSide": false,
+        "show": true,
+        "total": false,
+        "values": true
+      },
+      "lines": true,
+      "linewidth": 1,
+      "links": [],
+      "nullPointMode": "null",
+      "percentage": false,
+      "pointradius": 5,
+      "points": false,
+      "renderer": "flot",
+      "seriesOverrides": [
+        {
+          "alias": "/uncaught/",
+          "color": "#bf1b00"
+        }
+      ],
+      "spaceLength": 10,
+      "stack": false,
+      "steppedLine": false,
+      "targets": [
+        {
+          "expr": "sum(rate(swh_task_called_count{worker=~\"$worker\"}[$interval])) by (task)",
+          "format": "time_series",
+          "hide": false,
+          "intervalFactor": 1,
+          "legendFormat": "{{task}}",
+          "refId": "A"
+        },
+        {
+          "expr": "sum(rate(swh_task_failure_count{worker=~\"$worker\"}[$interval])) by (task)",
+          "format": "time_series",
+          "hide": false,
+          "interval": "",
+          "intervalFactor": 1,
+          "legendFormat": "{{task}} uncaught exceptions",
+          "refId": "C"
+        }
+      ],
+      "thresholds": [],
+      "timeFrom": null,
+      "timeRegions": [],
+      "timeShift": null,
+      "title": "Task counts",
+      "tooltip": {
+        "shared": true,
+        "sort": 0,
+        "value_type": "individual"
+      },
+      "type": "graph",
+      "xaxis": {
+        "buckets": null,
+        "mode": "time",
+        "name": null,
+        "show": true,
+        "values": []
+      },
+      "yaxes": [
+        {
+          "decimals": null,
+          "format": "short",
+          "label": "tasks per second",
+          "logBase": 1,
+          "max": null,
+          "min": "0",
+          "show": true
+        },
+        {
+          "format": "short",
+          "label": null,
+          "logBase": 1,
+          "max": null,
+          "min": null,
+          "show": true
+        }
+      ],
+      "yaxis": {
+        "align": false,
+        "alignLevel": null
+      }
+    },
+    {
+      "cards": {
+        "cardPadding": null,
+        "cardRound": null
+      },
+      "color": {
+        "cardColor": "#c15c17",
+        "colorScale": "sqrt",
+        "colorScheme": "interpolateViridis",
+        "exponent": 0.5,
+        "mode": "spectrum"
+      },
+      "dataFormat": "tsbuckets",
+      "datasource": "Prometheus",
+      "description": "Each square's color represents the number of tasks that completed within that duration range.",
+      "gridPos": {
+        "h": 14,
+        "w": 24,
+        "x": 0,
+        "y": 9
+      },
+      "heatmap": {},
+      "hideTimeOverride": false,
+      "highlightCards": true,
+      "id": 2,
+      "legend": {
+        "show": true
+      },
+      "links": [],
+      "repeat": "task",
+      "repeatDirection": "v",
+      "scopedVars": {
+        "task": {
+          "selected": true,
+          "text": "swh.loader.git.tasks.UpdateGitRepository",
+          "value": "swh.loader.git.tasks.UpdateGitRepository"
+        }
+      },
+      "targets": [
+        {
+          "expr": "sum(increase(swh_task_duration_seconds_bucket{task=~\"$task\",worker=~\"$worker\"}[$interval])) by (le)",
+          "format": "heatmap",
+          "instant": false,
+          "interval": "$interval",
+          "intervalFactor": 1,
+          "legendFormat": "{{le}}",
+          "refId": "A"
+        }
+      ],
+      "title": "$task durations",
+      "tooltip": {
+        "show": true,
+        "showHistogram": true
+      },
+      "tooltipDecimals": null,
+      "transparent": false,
+      "type": "heatmap",
+      "xAxis": {
+        "show": true
+      },
+      "xBucketNumber": null,
+      "xBucketSize": null,
+      "yAxis": {
+        "decimals": 0,
+        "format": "s",
+        "logBase": 1,
+        "max": null,
+        "min": null,
+        "show": true,
+        "splitFactor": null
+      },
+      "yBucketBound": "upper",
+      "yBucketNumber": null,
+      "yBucketSize": null
+    }
+  ],
+  "refresh": false,
+  "schemaVersion": 16,
+  "style": "dark",
+  "tags": [],
+  "templating": {
+    "list": [
+      {
+        "auto": true,
+        "auto_count": 100,
+        "auto_min": "2m",
+        "current": {
+          "text": "auto",
+          "value": "$__auto_interval_interval"
+        },
+        "hide": 0,
+        "label": "Interval",
+        "name": "interval",
+        "options": [
+          {
+            "selected": true,
+            "text": "auto",
+            "value": "$__auto_interval_interval"
+          },
+          {
+            "selected": false,
+            "text": "2m",
+            "value": "2m"
+          },
+          {
+            "selected": false,
+            "text": "5m",
+            "value": "5m"
+          },
+          {
+            "selected": false,
+            "text": "10m",
+            "value": "10m"
+          },
+          {
+            "selected": false,
+            "text": "30m",
+            "value": "30m"
+          },
+          {
+            "selected": false,
+            "text": "1h",
+            "value": "1h"
+          },
+          {
+            "selected": false,
+            "text": "6h",
+            "value": "6h"
+          },
+          {
+            "selected": false,
+            "text": "12h",
+            "value": "12h"
+          },
+          {
+            "selected": false,
+            "text": "1d",
+            "value": "1d"
+          },
+          {
+            "selected": false,
+            "text": "7d",
+            "value": "7d"
+          },
+          {
+            "selected": false,
+            "text": "14d",
+            "value": "14d"
+          },
+          {
+            "selected": false,
+            "text": "30d",
+            "value": "30d"
+          }
+        ],
+        "query": "2m,5m,10m,30m,1h,6h,12h,1d,7d,14d,30d",
+        "refresh": 2,
+        "skipUrlSync": false,
+        "type": "interval"
+      },
+      {
+        "allValue": null,
+        "current": {
+          "text": "swh.loader.git.tasks.UpdateGitRepository",
+          "value": "swh.loader.git.tasks.UpdateGitRepository"
+        },
+        "datasource": "Prometheus",
+        "definition": "label_values(swh_task_called_count, task)",
+        "hide": 0,
+        "includeAll": true,
+        "label": "Task name",
+        "multi": false,
+        "name": "task",
+        "options": [],
+        "query": "label_values(swh_task_called_count, task)",
+        "refresh": 2,
+        "regex": "",
+        "skipUrlSync": false,
+        "sort": 1,
+        "tagValuesQuery": "",
+        "tags": [],
+        "tagsQuery": "",
+        "type": "query",
+        "useTags": false
+      },
+      {
+        "allValue": null,
+        "current": {
+          "text": "All",
+          "value": [
+            "$__all"
+          ]
+        },
+        "datasource": "Prometheus",
+        "definition": "label_values(swh_task_called_count{task=~\"$task\"}, worker)",
+        "hide": 0,
+        "includeAll": true,
+        "label": "Worker",
+        "multi": true,
+        "name": "worker",
+        "options": [],
+        "query": "label_values(swh_task_called_count{task=~\"$task\"}, worker)",
+        "refresh": 2,
+        "regex": "",
+        "skipUrlSync": false,
+        "sort": 0,
+        "tagValuesQuery": "",
+        "tags": [],
+        "tagsQuery": "",
+        "type": "query",
+        "useTags": false
+      }
+    ]
+  },
+  "time": {
+    "from": "now-6h",
+    "to": "now"
+  },
+  "timepicker": {
+    "refresh_intervals": [
+      "5s",
+      "10s",
+      "30s",
+      "1m",
+      "5m",
+      "15m",
+      "30m",
+      "1h",
+      "2h",
+      "1d"
+    ],
+    "time_options": [
+      "5m",
+      "15m",
+      "1h",
+      "6h",
+      "12h",
+      "24h",
+      "2d",
+      "7d",
+      "30d"
+    ]
+  },
+  "timezone": "",
+  "title": "Worker task processing",
+  "uid": "b_xh3f9ik",
+  "version": 8
+}
diff --git a/conf/grafana/dashboards/tasks.json b/conf/grafana/dashboards/tasks.json
deleted file mode 100644
index bd9c1d5..0000000
--- a/conf/grafana/dashboards/tasks.json
+++ /dev/null
@@ -1,228 +0,0 @@
-{
-  "annotations": {
-    "list": [
-      {
-        "builtIn": 1,
-        "datasource": "-- Grafana --",
-        "enable": true,
-        "hide": true,
-        "iconColor": "rgba(0, 211, 255, 1)",
-        "name": "Annotations & Alerts",
-        "type": "dashboard"
-      }
-    ]
-  },
-  "editable": true,
-  "gnetId": null,
-  "graphTooltip": 0,
-  "id": 2,
-  "links": [],
-  "panels": [
-    {
-      "aliasColors": {},
-      "bars": false,
-      "dashLength": 10,
-      "dashes": false,
-      "datasource": "Prometheus",
-      "fill": 1,
-      "gridPos": {
-        "h": 9,
-        "w": 12,
-        "x": 0,
-        "y": 0
-      },
-      "id": 2,
-      "legend": {
-        "avg": false,
-        "current": false,
-        "max": false,
-        "min": false,
-        "show": true,
-        "total": false,
-        "values": false
-      },
-      "lines": true,
-      "linewidth": 1,
-      "links": [],
-      "nullPointMode": "null",
-      "percentage": false,
-      "pointradius": 5,
-      "points": false,
-      "renderer": "flot",
-      "seriesOverrides": [],
-      "spaceLength": 10,
-      "stack": false,
-      "steppedLine": false,
-      "targets": [
-        {
-          "expr": "rate(swh_task_duration_seconds_sum[5m]) / rate(swh_task_duration_seconds_count[5m])",
-          "format": "time_series",
-          "intervalFactor": 1,
-          "refId": "A"
-        }
-      ],
-      "thresholds": [],
-      "timeFrom": null,
-      "timeRegions": [],
-      "timeShift": null,
-      "title": "Task duration",
-      "tooltip": {
-        "shared": true,
-        "sort": 0,
-        "value_type": "individual"
-      },
-      "type": "graph",
-      "xaxis": {
-        "buckets": null,
-        "mode": "time",
-        "name": null,
-        "show": true,
-        "values": []
-      },
-      "yaxes": [
-        {
-          "format": "short",
-          "label": null,
-          "logBase": 1,
-          "max": null,
-          "min": null,
-          "show": true
-        },
-        {
-          "format": "short",
-          "label": null,
-          "logBase": 1,
-          "max": null,
-          "min": null,
-          "show": true
-        }
-      ],
-      "yaxis": {
-        "align": false,
-        "alignLevel": null
-      }
-    },
-    {
-      "aliasColors": {},
-      "bars": false,
-      "dashLength": 10,
-      "dashes": false,
-      "fill": 1,
-      "gridPos": {
-        "h": 9,
-        "w": 12,
-        "x": 12,
-        "y": 0
-      },
-      "id": 4,
-      "legend": {
-        "avg": false,
-        "current": false,
-        "max": false,
-        "min": false,
-        "show": true,
-        "total": false,
-        "values": false
-      },
-      "lines": true,
-      "linewidth": 1,
-      "links": [],
-      "nullPointMode": "null",
-      "percentage": false,
-      "pointradius": 5,
-      "points": false,
-      "renderer": "flot",
-      "seriesOverrides": [],
-      "spaceLength": 10,
-      "stack": false,
-      "steppedLine": false,
-      "targets": [
-        {
-          "expr": "increase(swh_task_success_count[1m])",
-          "format": "time_series",
-          "intervalFactor": 1,
-          "refId": "A"
-        }
-      ],
-      "thresholds": [],
-      "timeFrom": null,
-      "timeRegions": [],
-      "timeShift": null,
-      "title": "Task/mn",
-      "tooltip": {
-        "shared": true,
-        "sort": 0,
-        "value_type": "individual"
-      },
-      "type": "graph",
-      "xaxis": {
-        "buckets": null,
-        "mode": "time",
-        "name": null,
-        "show": true,
-        "values": []
-      },
-      "yaxes": [
-        {
-          "format": "short",
-          "label": null,
-          "logBase": 1,
-          "max": null,
-          "min": null,
-          "show": true
-        },
-        {
-          "format": "short",
-          "label": null,
-          "logBase": 1,
-          "max": null,
-          "min": null,
-          "show": true
-        }
-      ],
-      "yaxis": {
-        "align": false,
-        "alignLevel": null
-      }
-    }
-  ],
-  "schemaVersion": 16,
-  "style": "dark",
-  "tags": [],
-  "templating": {
-    "list": []
-  },
-  "time": {
-    "from": "now-15m",
-    "to": "now"
-  },
-  "timepicker": {
-    "refresh_intervals": [
-      "5s",
-      "10s",
-      "30s",
-      "1m",
-      "5m",
-      "15m",
-      "30m",
-      "1h",
-      "2h",
-      "1d"
-    ],
-    "time_options": [
-      "5m",
-      "15m",
-      "1h",
-      "6h",
-      "12h",
-      "24h",
-      "2d",
-      "7d",
-      "30d"
-    ]
-  },
-  "timezone": "",
-  "title": "Tasks",
-  "uid": "cRZm-Mumz",
-  "version": 4
-}