Merge pull request #299 from May2016/master

galaxy may not release page_cache

Author: imotai

src/agent/resource_collector.cc

@@ -784,7 +784,8 @@ bool GetCgroupMemoryUsage(const std::string& group_path,
 
         if (name == "rss") {
             mem_count++;
-            statistics->memory_rss_in_bytes += val; 
+            statistics->memory_rss_in_bytes = val; 
+            //statistics->memory_rss_in_bytes += val; 
         } else if (name == "cache") {
             mem_count++;
             statistics->memory_rss_in_bytes += val;