ceilometer:PRIMARY> db.currentOp()
{
	"inprog" : [
		{
			"opid" : 135695275,
			"active" : true,
			"secs_running" : 3,
			"microsecs_running" : NumberLong(3957478),
			"op" : "getmore",
			"ns" : "local.oplog.rs",
			"query" : {

			},
			"client" : "192.168.0.11:58507",
			"desc" : "conn439815",
			"threadId" : "0x7f425f2a3700",
			"connectionId" : 439815,
			"waitingForLock" : false,
			"numYields" : 0,
			"lockStats" : {
				"timeLockedMicros" : {
					"r" : NumberLong(163),
					"w" : NumberLong(0)
				},
				"timeAcquiringMicros" : {
					"r" : NumberLong(9),
					"w" : NumberLong(0)
				}
			}
		},
		{
			"opid" : 1330,
			"active" : false,
			"op" : "none",
			"ns" : "",
			"query" : {

			},
			"desc" : "repl writer worker 1",
			"threadId" : "0x7f4d68bfa700",
			"waitingForLock" : false,
			"numYields" : 0,
			"lockStats" : {
				"timeLockedMicros" : {
					"r" : NumberLong(0),
					"w" : NumberLong(117)
				},
				"timeAcquiringMicros" : {

				}
			}
		},
		{
			"opid" : 1294,
			"active" : false,
			"op" : "none",
			"ns" : "",
			"query" : {

			},
			"desc" : "repl writer worker 2",
			"threadId" : "0x7f4d693fb700",
			"waitingForLock" : false,
			"numYields" : 0,
			"lockStats" : {
				"timeLockedMicros" : {
					"r" : NumberLong(0),
					"w" : NumberLong(173)
				},
				"timeAcquiringMicros" : {

				}
			}
		},
		{
			"opid" : 135695276,
			"active" : true,
			"secs_running" : 3,
			"microsecs_running" : NumberLong(3956053),
			"op" : "getmore",
			"ns" : "local.oplog.rs",
			"query" : {

			},
			"client" : "192.168.0.12:41920",
			"desc" : "conn440769",
			"threadId" : "0x7f4252ddf700",
			"connectionId" : 440769,
			"waitingForLock" : false,
			"numYields" : 0,
			"lockStats" : {
				"timeLockedMicros" : {
					"r" : NumberLong(125),
					"w" : NumberLong(0)
				},
				"timeAcquiringMicros" : {
					"r" : NumberLong(7),
					"w" : NumberLong(0)
				}
			}
		},
		{
			"opid" : 135683872,
			"active" : true,
			"secs_running" : 75,
			"microsecs_running" : NumberLong(75030714),
			"op" : "query",
			"ns" : "ceilometer.meter",
			"query" : {
				"$msg" : "query not recording (too large)"
			},
			"client" : "192.168.0.7:33338",
			"desc" : "conn441390",
			"threadId" : "0x7f42633dd700",
			"connectionId" : 441390,
			"locks" : {
				"^" : "r",
				"^ceilometer" : "R"
			},
			"waitingForLock" : false,
			"numYields" : 19741,
			"lockStats" : {
				"timeLockedMicros" : {
					"r" : NumberLong(131258027),
					"w" : NumberLong(0)
				},
				"timeAcquiringMicros" : {
					"r" : NumberLong(2456487),
					"w" : NumberLong(0)
				}
			}
		}
	]
}



ceilometer:PRIMARY> db.runCommand( { serverStatus: 1, workingSet: 1, metrics: 0, locks: 0 } )
{
	"host" : "node-5.fuel",
	"version" : "2.6.10",
	"process" : "mongod",
	"pid" : NumberLong(22112),
	"uptime" : 1112982,
	"uptimeMillis" : NumberLong(1112981660),
	"uptimeEstimate" : 1080241,
	"localTime" : ISODate("2016-07-13T09:59:33.164Z"),
	"asserts" : {
		"regular" : 0,
		"warning" : 0,
		"msg" : 0,
		"user" : 6,
		"rollovers" : 0
	},
	"backgroundFlushing" : {
		"flushes" : 18549,
		"total_ms" : 2663624,
		"average_ms" : 143.59933150035042,
		"last_ms" : 21,
		"last_finished" : ISODate("2016-07-13T09:58:59.101Z")
	},
	"connections" : {
		"current" : 262,
		"available" : 50938,
		"totalCreated" : NumberLong(441403)
	},
	"cursors" : {
		"note" : "deprecated, use server status metrics",
		"clientCursors_size" : 2,
		"totalOpen" : 2,
		"pinned" : 0,
		"totalNoTimeout" : 0,
		"timedOut" : 6
	},
	"dur" : {
		"commits" : 29,
		"journaledMB" : 0.008192,
		"writeToDataFilesMB" : 0.001082,
		"compression" : 6.720262510254307,
		"commitsInWriteLock" : 0,
		"earlyCommits" : 0,
		"timeMs" : {
			"dt" : 3000,
			"prepLogBuffer" : 0,
			"writeToJournal" : 1,
			"writeToDataFiles" : 0,
			"remapPrivateView" : 0
		}
	},
	"extra_info" : {
		"note" : "fields vary by platform",
		"heap_usage_bytes" : 197870984,
		"page_faults" : 250712221
	},
	"globalLock" : {
		"totalTime" : NumberLong("1112981662000"),
		"lockTime" : NumberLong("6290549859"),
		"currentQueue" : {
			"total" : 0,
			"readers" : 0,
			"writers" : 0
		},
		"activeClients" : {
			"total" : 0,
			"readers" : 0,
			"writers" : 0
		}
	},
	"indexCounters" : {
		"accesses" : 1022072542,
		"hits" : 1022072542,
		"misses" : 0,
		"resets" : 0,
		"missRatio" : 0
	},
	"network" : {
		"bytesIn" : 59222662374,
		"bytesOut" : 96910035531,
		"numRequests" : 80899312
	},
	"opcounters" : {
		"insert" : 15482042,
		"query" : 354407,
		"update" : 11868408,
		"delete" : 0,
		"getmore" : 15753099,
		"command" : 37759718
	},
	"opcountersRepl" : {
		"insert" : 184,
		"query" : 0,
		"update" : 146,
		"delete" : 714,
		"getmore" : 0,
		"command" : 0
	},
	"recordStats" : {
		"accessesNotInMemory" : 2264768,
		"pageFaultExceptionsThrown" : 23056,
		"admin" : {
			"accessesNotInMemory" : 5,
			"pageFaultExceptionsThrown" : 0
		},
		"ceilometer" : {
			"accessesNotInMemory" : 2261201,
			"pageFaultExceptionsThrown" : 23056
		},
		"local" : {
			"accessesNotInMemory" : 3562,
			"pageFaultExceptionsThrown" : 0
		}
	},
	"repl" : {
		"setName" : "ceilometer",
		"setVersion" : 3,
		"ismaster" : true,
		"secondary" : false,
		"hosts" : [
			"192.168.0.7:27017",
			"192.168.0.11:27017",
			"192.168.0.12:27017"
		],
		"primary" : "192.168.0.7:27017",
		"me" : "192.168.0.7:27017",
		"electionId" : ObjectId("577515a61ee824d38b47d7bd")
	},
	"workingSet" : {
		"note" : "thisIsAnEstimate",
		"pagesInMemory" : 3700127,
		"computationTimeMicros" : 592762,
		"overSeconds" : 288
	},
	"ok" : 1
}
ceilometer:PRIMARY>



some interesting logs:

<14>Jul 13 10:08:42 node-5 mongod.27017[22112]: [conn441497] command ceilometer.$cmd command: aggregate { aggregate: "meter", pipeline: [ { $match: { timestamp: { $lte: new Date(1468404521711), $gte: new Date(1468403921711) }, counter_name: "cpu_util", project_id: "65f8d3591f2c478e8373cbabcdcd2302", resource_id: "350fe65e-6805-426e-8cc8-a0bd303eac44" } }, { $sort: { timestamp: 1 } }, { $group: { count: { $sum: 1 }, avg: { $avg: "$counter_volume" }, first_timestamp: { $min: "$timestamp" }, min: { $min: "$counter_volume" }, last_timestamp: { $max: "$timestamp" }, max: { $max: "$counter_volume" }, sum: { $sum: "$counter_volume" }, _id: { period_start: { $divide: [ { $subtract: [ { $subtract: [ "$timestamp", new Date(1468403921711) ] }, { $mod: [ { $subtract: [ "$timestamp", new Date(1468403921711) ] }, 300000 ] } ] }, 300000 ] }, name: "$counter_name", unit: "$counter_unit" } } }, { $sort: { _id.period_start: 1 } }, { $project: { count: "$count", min: "$min", first_timestamp: "$first_timestamp", name: "$_id.name", last_timestamp: "$last_timestamp", max: "$max", period_start: "$_id.period_start", avg: "$avg", sum: "$sum", unit: "$_id.unit" } } ], cursor: {}, allowDiskUse: true } keyUpdates:0 numYields:6 locks(micros) r:229097 reslen:104 198ms

<14>Jul 13 10:08:44 node-5 mongod.27017[22112]: [conn441471] command ceilometer.$cmd command: aggregate { aggregate: "meter", pipeline: [ { $match: { timestamp: { $gt: new Date(1467504000000), $lt: new Date(1468404377000) }, counter_name: "memory.gb", project_id: "29a7498491d843f39bca3fa90b1e442e" } }, { $sort: { timestamp: 1 } }, { $group: { count: { $sum: 1 }, avg: { $avg: "$counter_volume" }, first_timestamp: { $min: "$timestamp" }, min: { $min: "$counter_volume" }, last_timestamp: { $max: "$timestamp" }, max: { $max: "$counter_volume" }, sum: { $sum: "$counter_volume" }, _id: { name: "$counter_name", unit: "$counter_unit" } } }, { $sort: { _id.period_start: 1 } }, { $project: { count: "$count", min: "$min", first_timestamp: "$first_timestamp", name: "$_id.name", last_timestamp: "$last_timestamp", max: "$max", period_start: "$_id.period_start", avg: "$avg", sum: "$sum", unit: "$_id.unit" } } ], cursor: {}, allowDiskUse: true } keyUpdates:0 numYields:42830 locks(micros) r:219517031 reslen:300 145224ms

<12>Jul 13 10:08:56 node-5 mongod.27017[22112]: [conn398160] ClientCursor::staticYield can't unlock b/c of recursive lock ns:  top: { opid: 135779926, active: true, secs_running: 0, microsecs_running: 325, op: "query", ns: "ceilometer.resource", query: { $msg: "query not recording (too large)" }, client: "192.168.0.7:36238", desc: "conn398160", threadId: "0x7f42637e1700", connectionId: 398160, locks: { ^: "w", ^ceilometer: "W" }, waitingForLock: false, numYields: 0, lockStats: { timeLockedMicros: {}, timeAcquiringMicros: { r: 0, w: 164301 } } }

<14>Jul 13 10:09:20 node-5 mongod.27017[22112]: [conn441479] command ceilometer.$cmd command: aggregate { aggregate: "meter", pipeline: [ { $match: { timestamp: { $gt: new Date(1467331200000), $lt: new Date(1470009600000) }, counter_name: "vcpus" } }, { $sort: { timestamp: 1 } }, { $group: { count: { $sum: 1 }, avg: { $avg: "$counter_volume" }, first_timestamp: { $min: "$timestamp" }, min: { $min: "$counter_volume" }, last_timestamp: { $max: "$timestamp" }, max: { $max: "$counter_volume" }, sum: { $sum: "$counter_volume" }, _id: { name: "$counter_name", unit: "$counter_unit" } } }, { $sort: { _id.period_start: 1 } }, { $project: { count: "$count", min: "$min", first_timestamp: "$first_timestamp", name: "$_id.name", last_timestamp: "$last_timestamp", max: "$max", period_start: "$_id.period_start", avg: "$avg", sum: "$sum", unit: "$_id.unit" } } ], cursor: {}, allowDiskUse: true } keyUpdates:0 numYields:11664 locks(micros) r:245425709 reslen:284 140423ms