Is meteor using the Mongo Oplog?
<p>How can I check if meteor is using the oplog  of my mongo?
I have a cluster of mongo  and set two envs for my meteor.</p>

<pre><code>MONGO_URL=mongodb://mongo/app?replicaSet=rs0
MONGO_OPLOG_URL=mongodb://mongo/local?authSource=app
</code></pre>

<p>How can I check if the opt log is actually in use. Meteor can fallback to query polling which is very inefficient but I would like to see if it's working properly with the oplog.</p>

<p>Any ideas?</p>