How to get total number of records across all databases in MongoDB?

Question

Is there any way through which i can get total number of records across all the databases in MongoDB server.

There is command for finding total records in a particular collection of a databases. But i want to get the count of total number of records across all databases.

Answer 1

Simply use db.stats

db.stats().objects

The objects property return the count of documents in the database across all collections.

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To get the total number across all databases, you may need to do something like this:

let client = db.getMongo();
client.getDBNames().filter( name => name !== 'local')
    .map( elt => client.getDB(elt).stats().objects )
    .reduce( ( acc, cur ) => acc + cur, 0);