closes #5081

src/posts/cache.js

@@ -1,11 +1,10 @@
 var	LRU = require('lru-cache');
+var meta = require('../meta');
 
 var cache = LRU({
-	max: 1048576,
+	max: parseInt(meta.config.postCacheSize, 10) || 1048576,
 	length: function (n) { return n.length; },
 	maxAge: 1000 * 60 * 60
 });
 
-
-
 module.exports = cache;