【MongoDB 3.2.6】在服务器没有任何负载的情况下，SECONDARY节点的LOG中，频繁出现如下信息。想了解该如何处理？

LOG如下：

2017-01-05T11:42:25.876+0800 I COMMAND  [ftdc] serverStatus was very slow: { after basic: 0, after asserts: 0, after connections: 0, after extra_info: 380, after globalLock: 380, after locks: 380, after network: 380, after opcounters: 380, after opcountersRepl: 380, after repl: 380, after storageEngine: 380, after tcmalloc: 380, after wiredTiger: 380, at end: 1870 }
2017-01-05T11:44:47.428+0800 I COMMAND  [ftdc] serverStatus was very slow: { after basic: 0, after asserts: 0, after connections: 0, after extra_info: 880, after globalLock: 880, after locks: 880, after network: 880, after opcounters: 880, after opcountersRepl: 880, after repl: 880, after storageEngine: 880, after tcmalloc: 880, after wiredTiger: 880, at end: 1410 }