How to print MongoDB Collection statistics 

MongoDB is a scalable, high-performance, open source NoSQL database. It offers Ad hoc queries, Indexing, Replication, Load balancing, File storage (GridFS), Aggregation, MapReduce and Server-side JavaScript execution. This requires the library mongo-2.8.0.jar to be present in the classpath. The following example shows how to get the statistics of a Collection.

File Name  :   com/bethecoder/tutorials/mongodb/tests/CollectionStatsTest.java  Author  :   Sudhakar KV Email  :   [email protected]

package com.bethecoder.tutorials.mongodb.tests; import java.net.UnknownHostException; import com.mongodb.CommandResult; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.Mongo; import com.mongodb.MongoException; public class CollectionStatsTest {   /**    * @param args    */   public static void main(String[] args) {     try {       //Connect to mongoDB with given IP and PORT       Mongo mongo = new Mongo("localhost", 27017);              //Get the database object       DB database = mongo.getDB("mytestdb");              //Gets a collection with a given name.       DBCollection collection = database.getCollection("students");            //Get the collections statistics       CommandResult stats = collection.getStats();       System.out.println(stats);     } catch (UnknownHostException e) {       e.printStackTrace();     } catch (MongoException e) {       e.printStackTrace();     }   } }

{ 
	"serverUsed" : "localhost/127.0.0.1:27017" , 
	"ns" : "mytestdb.students" , 
	"count" : 2 , 
	"size" : 120 , 
	"avgObjSize" : 60.0 , 
	"storageSize" : 4096 , 
	"numExtents" : 1 , 
	"nindexes" : 1 , 
	"lastExtentSize" : 4096 , 
	"paddingFactor" : 1.0 , 
	"flags" : 1 , 
	"totalIndexSize" : 8176 , 
	"indexSizes" : { "_id_" : 8176} , 
	"ok" : 1.0
}