mongodb 查看數(shù)據(jù)庫和表大小

> db.stats(); 
{ 
  "db" : "test",        //當(dāng)前數(shù)據(jù)庫 
  "collections" : 3,      //當(dāng)前數(shù)據(jù)庫多少表 
  "objects" : 4,        //當(dāng)前數(shù)據(jù)庫所有表多少條數(shù)據(jù) 
  "avgObjSize" : 51,      //每條數(shù)據(jù)的平均大小 
  "dataSize" : 204,      //所有數(shù)據(jù)的總大小 
  "storageSize" : 16384,    //所有數(shù)據(jù)占的磁盤大小 
  "numExtents" : 3, 
  "indexes" : 1,        //索引數(shù) 
  "indexSize" : 8176,     //索引大小 
  "fileSize" : 201326592,   //預(yù)分配給數(shù)據(jù)庫的文件大小 
  "nsSizeMB" : 16, 
  "dataFileVersion" : { 
    "major" : 4, 
    "minor" : 5 
  }, 
  "ok" : 1 
} 

> db.posts.stats(); 
{ 
  "ns" : "test.posts", 
  "count" : 1, 
  "size" : 56, 
  "avgObjSize" : 56, 
  "storageSize" : 8192, 
  "numExtents" : 1, 
  "nindexes" : 1, 
  "lastExtentSize" : 8192, 
  "paddingFactor" : 1, 
  "systemFlags" : 1, 
  "userFlags" : 0, 
  "totalIndexSize" : 8176, 
  "indexSizes" : { 
    "_id_" : 8176 
  }, 
  "ok" : 1 
}