mongo集群

mongos> sh.status()
databases:
    {  "_id" : "foo",  "primary" : "shard1",  "partitioned" : false }
    {  "_id" : "bar",  "primary" : "shard0",  "partitioned" : false }

访问shard1的从

mongo 127.0.0.1:28010

在mongo shell中执行如下命令

shard1:SECONDARY> db.currentOp(    {      "active" : true,      "secs_running" : { "$gt" : 10 }    } )

    {
  "desc": "conn1041165",
  "threadId": "139624352057088",
  "connectionId": 1041165,
  "client": "192.168.0.1:54368",
  "active": true,
  "opid": 61729430,
  "secs_running": 42746,
  "microsecs_running": NumberLong("42746814047"),
  "op": "command",
  "ns": "bar",
  "query": {
    "dbstats": 1
  },
  "numYields": 0,
  "locks": {
    "Global": "r"
  },
  "waitingForLock": false,
  "lockStats": {
    "Global": {
      "acquireCount": {
        "r": NumberLong(1)
      }
    }
  }
}
],
"ok": 1
}
...

奇怪的是 发现有很多上述的查询 shard1的从干嘛要去统计shard0的库呢？ 并且为什么执行时间还这么久 差不多执行了12个小时

"dbstats":1 是对应下面的命令吗

> db.stats()
{
    "db" : "test",
    "collections" : 73,
    "objects" : 246794,
    "avgObjSize" : 2915.7151713574885,
    "dataSize" : 719581010,
    "storageSize" : 787140608,
    "numExtents" : 0,
    "indexes" : 85,
    "indexSize" : 11505664,
    "ok" : 1
}