Add more text to Obelix Metric Docs

docs/metrics.rst

@@ -17,3 +17,46 @@ For metrics to be collected and stored, the --enable-metrics argument needs to b
 
     # Enable Metrics
     --enable-metrics
+
+Stored Metrics
+------------
+By default the metrics from Obelix are gathered from different modules and stored as json in redis.
+
+An example of the stored data:
+
+.. code-block:: javascript
+
+    "metric" : {
+        "total_feeded" : 736,
+        "feeded" : 7,
+        "total_recommendations_built" : 651,
+        "recommendations_built" : 7,
+        "all_relationships_count" : 9837,
+        "all_users_count" : 2442,
+        "all_items_count" : 5154,
+        "cache_queue_size" : 3,
+        "logentries_queue_size" : 1
+        "timestamp" : "2015-05-25T02:20:45.637367",
+    }
+
+The `total_feeded` and `total_recommendations_built` are aggregated over time, where as the others are snapshots.
+
+total_feeded: Number of interactions sent to Obelix (user x viewed item y) since the beggning.
+
+feeded: The same as total_feeded, but the number represent the number of feeded since last time checked (typically a 5 minute interval).
+
+total_recommendations_built: Number of recommendations built, it will be close to the number of total_feeded,
+but if a user view several items in a short amount of time, Obelix will try to only build the recommendations for that user once.
+
+recommendations_built: The same as total_recommendations_built, but the number represent the number of recommendations since last time checked (typically a 5 minute interval).
+
+all_relationships_count: The current number of relationships in Obelix
+
+all_users_count: The current number of users in Obelix
+
+all_items_count: The current number of items in Obelix
+
+cache_queue_size: The number of items in the cache queue (to build recommendations).
+
+logentries_queue_size: The number of items in the queue ready for feeding.
+l

src/main/java/metrics/MetricsCollector.java

@@ -38,6 +38,7 @@ public MetricsCollector(boolean enableMetrics, String metricsSaveLocation,
             this.redisQueueManager = redisQueueManager;
             this.usersCacheQueue = usersCacheQueue;
         }
+
         else {
 
             this.storage = new RedisObelixStore();