MongoDB: Count of Indexes on a collection

This simple one liner will list all the collections along with the number of indexes it has.

db.getCollectionNames().forEach(function(collection) {print(collection + ": " + db[collection].getIndexes().length);});

 

More info here:

https://stackoverflow.com/questions/39952005/count-of-indexes-for-each-collection-in-mongodb

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