Mongodb db.serverStatus()所关心的几个输出值

	 

	1. globalLock，关键是看一下PRIMARY节点上的参数

	"globalLock" : {

	                                "totalTime" : 47279680356,

	                                "lockTime" : 1586763,

	                                "ratio" : 0.00003356120405324679,

	                                "currentQueue" : {

	                                                "total" : 0,

	                                                "readers" : 0,

	                                                "writers" : 0

	                                },

	                                "activeClients" : {

	                                                "total" : 2,

	                                                "readers" : 2,

	                                                "writers" : 0

	                                }

	                },

	 

	activeClients表示中可以看出slave有两个，这个值在slave上始终为0

	2. connections客户端连接数

	Master上的

	"connections" : {

	        "current" : 9,

	        "available" : 810

	},

	Slave上的

	"connections" : {

	     "current" : 16,

	     "available" : 803

	},

	在客户端增加读取线程后，Master上不会变，而Slave上会增加

	 

	3. opcounters

	Master上

	"opcounters" : {

	        "insert" : 7,

	        "query" : 1215,

	        "update" : 33,

	        "delete" : 1,

	        "getmore" : 32558,

	        "command" : 48141

	},

	Slave上

	"opcounters" : {

	             "insert" : 0,

	             "query" : 4971,

	             "update" : 0,

	             "delete" : 0,

	             "getmore" : 0,

	             "command" : 44342

	},

	可以看到insert、update、delete是在Master上，查询是在slave上，可以检查master-slave设置是否正确，注意要先执行过rs.slaveOk()

	 

	本文出自 “厚土常丰” 博客

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