daniel-sc

// This script loops though all collections of all db in a MongoDB and runs the compact operation on them
// Simply paste this into the Mongo shell

db.getMongo().setReadPref('secondary');
db.getMongo().getDBNames().forEach(function(dbName) {
    if (["local", "admin", "system", "config"].indexOf(dbName) < 0 /* && dbName > "config"*/) {
        var subject = db.getSiblingDB(dbName);
        subject.getCollectionNames()
            .filter(c => ['system.users', 'system.roles'].indexOf(c) < 0)
            .forEach(function (collectionName) {