Find largest document size in MongoDB

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You can use a small shell script to get this value.

Note: this will perform a full table scan, which will be slow on large collections.

let max = 0, id = null;
db.test.find().forEach(doc => {
    const size = Object.bsonsize(doc); 
    if(size > max) {
        max = size;
        id = doc._id;
    } 
});
print(id, max);

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