How to get MongoDB statistics for all collections?

Useful script to find out MongoDB collections size and other statistics.

Studio 3T > IntelliShell

var dbs = db.getMongo().getDBNames();

for (adb of dbs) {
    var colls = db.getSiblingDB(adb).getCollectionNames()

    for (coll of colls) {
        var info = db.getSiblingDB(adb).getCollection(coll).stats(1024);
        if (info.ok) {
            printjson({
                ns: info.ns,
                count: info.count,
                size: info.size,
                storageSize: info.storageSize,
                nindexes: info.nindexes,
                totalIndexSize: info.totalIndexSize
            });
        }
    }
}

• Double click on storageSize column to sort by size descending

Reference: How to get MongoDB statistics for all collections? #Studio3T_AMA