cache improvements, stats

src/controllers/admin/cache.js

@@ -2,6 +2,8 @@
 
 var cacheController = module.exports;
 
+var utils = require('../../utils');
+
 cacheController.get = function (req, res) {
 	var postCache = require('../../posts/cache');
 	var groupCache = require('../../groups').cache;
@@ -38,6 +40,9 @@ cacheController.get = function (req, res) {
 			itemCount: objectCache.itemCount,
 			percentFull: ((objectCache.length / objectCache.max) * 100).toFixed(2),
 			dump: req.query.debug ? JSON.stringify(objectCache.dump(), null, 4) : false,
+			hits: utils.addCommas(String(objectCache.hits)),
+			misses: utils.addCommas(String(objectCache.misses)),
+			missRatio: (1 - (objectCache.hits / (objectCache.hits + objectCache.misses))).toFixed(4),
 		};
 	}
 

src/database/mongo/hash.js

@@ -13,6 +13,8 @@ module.exports = function (db, module) {
 		maxAge: 0,
 	});
 
+	cache.misses = 0;
+	cache.hits = 0;
 	module.objectCache = cache;
 
 	pubsub.on('mongo:hash:cache:del', function (key) {
@@ -86,9 +88,14 @@ module.exports = function (db, module) {
 		}
 
 		var nonCachedKeys = keys.filter(function (key) {
-			return !cache.get(key);
+			return cache.get(key) === undefined;
 		});
 
+		var hits = keys.length - nonCachedKeys.length;
+		var misses = keys.length - hits;
+		cache.hits += hits;
+		cache.misses += misses;
+
 		if (!nonCachedKeys.length) {
 			return getFromCache(callback);
 		}
@@ -98,12 +105,9 @@ module.exports = function (db, module) {
 				return callback(err);
 			}
 
-			data.forEach(function (objectData) {
-				if (objectData) {
-					var key = objectData._key;
-					delete objectData._key;
-					cache.set(key, objectData);
-				}
+			var map = helpers.toMap(data);
+			nonCachedKeys.forEach(function (key) {
+				cache.set(key, map[key] || null);
 			});
 
 			getFromCache(callback);

src/views/admin/advanced/cache.tpl

@@ -30,15 +30,20 @@
 			<div class="panel-heading"><i class="fa fa-calendar-o"></i> Object Cache</div>
 			<div class="panel-body">
 
+
+
 				<label>[[admin/advanced/cache:length-to-max]]</label><br/>
 				<span>{objectCache.length} / {objectCache.max}</span><br/>
-
 				<div class="progress">
 					<div class="progress-bar" role="progressbar" aria-valuenow="{objectCache.percentFull}" aria-valuemin="0" aria-valuemax="100" style="width: {objectCache.percentFull}%;">
 						[[admin/advanced/cache:percent-full, {objectCache.percentFull}]]
 					</div>
 				</div>
 
+				<label>Hits:</label> <span>{objectCache.hits}</span><br/>
+				<label>Misses:</label> <span>{objectCache.misses}</span><br/>
+				<label>Miss Ratio:</label> <span>{objectCache.missRatio}</span><br/>
+
 				<!-- IF objectCache.dump -->
 				<pre>{objectCache.dump}</pre>
 				<!-- ENDIF objectCache.dump -->