Use histograms instead of gagues

Removed test assertion for metric as histograms are not collectors
so we can't really test it. Left the test though as it's still valuable.

1 files changed, 2 insertions, 2 deletions

diff --git a/metrics/metrics.go b/metrics/metrics.go
index 949ffa1e..7e6d72e1 100644
--- a/metrics/metrics.go
+++ b/metrics/metrics.go
@@ -78,13 +78,13 @@ var (
 	}, []string{"status_code"})
 
 	// ServingFileSize metric for file size serving. serving_types: disk and object_storage
-	ServingFileSize = prometheus.NewGaugeVec(prometheus.GaugeOpts{
+	ServingFileSize = prometheus.NewHistogramVec(prometheus.HistogramOpts{
 		Name: "gitlab_pages_serving_file_size",
 		Help: "The size in bytes for each file that has been served",
 	}, []string{"serving_type", "content_type"})
 
 	// ServingTime metric for time taken to find a file serving it or not found.
-	ServingTime = prometheus.NewGauge(prometheus.GaugeOpts{
+	ServingTime = prometheus.NewHistogram(prometheus.HistogramOpts{
 		Name: "gitlab_pages_serving_time",
 		Help: "The time (in seconds) taken to serve a file",
 	})