There are customer server and admin server.
The two server shares same mongodb and same database,
but the projects are separating Meteor project.
When the admin server insert a bulk data (over 70million) into ‘A collection’,
the customer server’s cpu/memory runs extremely high during the admin server inserting the data.
So I could assume that the customer server fetching the inserted oplog data by admin server.
The point that I don’t understand is,
why the customer server is forking or syncing the oplog data,
even there’s no ‘A collection’ declair in customer server.
I expected that the customer server never fetching anything when the admin server insert a data, because ‘It is not decliared in the customer server’.
So I want to know Meteor project is syncing oplog even the project has not declaired the collection on the same database.
Or is there other reason for this?