From c1c1bcb874a9ec639fdea2f30656f2f1fbf69c54 Mon Sep 17 00:00:00 2001
From: Alexander Zobnin <alexanderzobnin@gmail.com>
Date: Tue, 27 Jun 2017 17:42:21 +0300
Subject: [PATCH] histogram: don't cut negative values, issue #8628

---
 public/app/plugins/panel/graph/graph.ts     | 2 +-
 public/app/plugins/panel/graph/histogram.ts | 5 ++++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/public/app/plugins/panel/graph/graph.ts b/public/app/plugins/panel/graph/graph.ts
index 16d259c210e..c8d8fbfb25f 100755
--- a/public/app/plugins/panel/graph/graph.ts
+++ b/public/app/plugins/panel/graph/graph.ts
@@ -427,7 +427,7 @@ coreModule.directive('grafanaGraph', function($rootScope, timeSrv, popoverSrv) {
           ticks = _.map(data[0].data, point => point[0]);
 
           // Expand ticks for pretty view
-          min = Math.max(0, _.min(ticks) - bucketSize);
+          min = _.min(ticks) - bucketSize;
           max = _.max(ticks) + bucketSize;
 
           ticks = [];
diff --git a/public/app/plugins/panel/graph/histogram.ts b/public/app/plugins/panel/graph/histogram.ts
index e6ad7ebb0f6..c60782942f2 100644
--- a/public/app/plugins/panel/graph/histogram.ts
+++ b/public/app/plugins/panel/graph/histogram.ts
@@ -38,9 +38,12 @@ export function convertValuesToHistogram(values: number[], bucketSize: number):
     }
   }
 
-  return _.map(histogram, (count, bound) => {
+  let histogam_series = _.map(histogram, (count, bound) => {
     return [Number(bound), count];
   });
+
+  // Sort by Y axis values
+  return _.sortBy(histogam_series, point => point[0]);
 }
 
 function getBucketBound(value: number, bucketSize: number): number {