determine more accurately which connections are active or waiting on lock and also produce new metric called total

Author: Aaron Baer

bin/metric-postgres-connections.rb

@@ -77,18 +77,21 @@ def run
 
     metrics = {
       active: 0,
-      waiting: 0
+      waiting: 0,
+      total: 0
     }
     con.exec(request.join(' ')) do |result|
       result.each do |row|
-        if row['waiting']
+        if row['waiting'] == 't'
           metrics[:waiting] = row['count']
-        else
+        elsif role['waiting'] == 'f'
           metrics[:active] = row['count']
         end
       end
     end
 
+    metrics[:total] = (metrics[:waiting].to_i + metrics[:active].to_i)
+
     metrics.each do |metric, value|
       output "#{config[:scheme]}.connections.#{config[:db]}.#{metric}", value, timestamp
     end