I'm developping an app with Meteor.js. For that, I do have a cluster of mongo instances for oplog tailing. In addition, I'm using Kadira in order to trace my app perfs. Since I've enabled oplog ta...

We are seeing very slow login response times on our Meteor app. As load approaches 200 logins/minute the observeChanges calls become quite slow: As loginWith<service> is part of Meteor cor...