mongostat:

     insert  query update delete getmore command flushes mapped  vsize    res faults locked % idx miss %     qr|qw   ar|aw  netIn netOut  conn             set repl       time
          0      0     64      0       0      36       0  12.2g  24.7g   182m      5     95.1          0      0|31    0|39    32k     5k    65 analyticsreport    M   18:20:04
          0      0    132      0       0      97       0  12.2g  24.7g   252m      2     95.5          0      0|37    0|39    62k    17k    65 analyticsreport    M   18:20:05
          0      0     42      0       0      19       0  12.2g  24.7g   270m      3     96.4          0      0|25    0|39    20k     3k    65 analyticsreport    M   18:20:06
          0      0     70      0       0      35       0  12.2g  24.7g   239m      1     96.3          0      0|15    0|38    33k     5k    65 analyticsreport    M   18:20:07
          0      0     65      0       0      29       0  12.2g  24.7g   258m      3     95.8          0      0|21    0|40    30k     5k    65 analyticsreport    M   18:20:08
          0      0     71      0       0      36       0  12.2g  24.7g   223m      6     95.4          0      0|35    0|40    32k     5k    65 analyticsreport    M   18:20:09
          0      0     41      0       0      52       0  12.2g  24.7g   233m      0     95.8          0      0|26    0|40    19k    11k    65 analyticsreport    M   18:20:10
          0      0     61      0       0      23       0  12.2g  24.7g   224m      1     94.5          0      0|12    0|41    25k     4k    65 analyticsreport    M   18:20:11
          0      0    175      0       0      67       0  12.2g  24.7g   269m      0     95.8          0      0|29    0|41    74k     9k    65 analyticsreport    M   18:20:12
          0      0    143      0       0      61       0  12.2g  24.7g   248m      0     94.5          0      0|30    0|41    62k     8k    65 analyticsreport    M   18:20:13

db.stats():

{
    "db" : "ar",
    "collections" : 7,
    "objects" : 1989220,
    "avgObjSize" : 778.9921034375283,
    "dataSize" : 1549586672,
    "storageSize" : 2059956224,
    "numExtents" : 22,
    "indexes" : 15,
    "indexSize" : 691902176,
    "fileSize" : 8519680000,
    "nsSizeMB" : 16,
    "ok" : 1
}

db.serverStatus():
{
    "host" : "ar01",
    "version" : "2.0.4",
    "process" : "mongod",
    "uptime" : 509,
    "uptimeEstimate" : 500,
    "localTime" : ISODate("2013-05-14T16:22:20.604Z"),
    "globalLock" : {
        "totalTime" : 508621612,
        "lockTime" : 437837733,
        "ratio" : 0.8608319478960718,
        "currentQueue" : {
            "total" : 16,
            "readers" : 0,
            "writers" : 16
        },
        "activeClients" : {
            "total" : 38,
            "readers" : 0,
            "writers" : 38
        }
    },
    "mem" : {
        "bits" : 64,
        "resident" : 223,
        "virtual" : 25331,
        "supported" : true,
        "mapped" : 12443,
        "mappedWithJournal" : 24886
    },
    "connections" : {
        "current" : 65,
        "available" : 19935
    },
    "extra_info" : {
        "note" : "fields vary by platform",
        "heap_usage_bytes" : 1887872,
        "page_faults" : 8847
    },
    "indexCounters" : {
        "btree" : {
            "accesses" : 5987,
            "hits" : 5973,
            "misses" : 14,
            "resets" : 0,
            "missRatio" : 0.0023383998663771507
        }
    },
    "backgroundFlushing" : {
        "flushes" : 8,
        "total_ms" : 2758,
        "average_ms" : 344.75,
        "last_ms" : 737,
        "last_finished" : ISODate("2013-05-14T16:21:53.236Z")
    },
    "cursors" : {
        "totalOpen" : 260,
        "clientCursors_size" : 260,
        "timedOut" : 0,
        "totalNoTimeout" : 260
    },
    "network" : {
        "bytesIn" : 18263905,
        "bytesOut" : 13681127,
        "numRequests" : 60306
    },
    "repl" : {
        "setName" : "analyticsreport",
        "ismaster" : true,
        "secondary" : false,
        "hosts" : [
            "xxx"
        ],
        "primary" : "xxx",
        "me" : "xxx"
    },
    "opcounters" : {
        "insert" : 1,
        "query" : 14,
        "update" : 38879,
        "delete" : 0,
        "getmore" : 3,
        "command" : 21461
    },
    "asserts" : {
        "regular" : 0,
        "warning" : 0,
        "msg" : 0,
        "user" : 9070,
        "rollovers" : 0
    },
    "writeBacksQueued" : false,
    "dur" : {
        "commits" : 24,
        "journaledMB" : 3.825664,
        "writeToDataFilesMB" : 10.594284,
        "compression" : 0.36014611580872474,
        "commitsInWriteLock" : 0,
        "earlyCommits" : 0,
        "timeMs" : {
            "dt" : 3088,
            "prepLogBuffer" : 5,
            "writeToJournal" : 336,
            "writeToDataFiles" : 28,
            "remapPrivateView" : 71
        }
    },
    "ok" : 1
}