MongoDB configuration we use on Meteor.js

mongodb.conf

# Our servers has 32GB of RAM

storage:
  dbPath: /data/mongo
  journal:
    enabled: true
  engine: wiredTiger
  wiredTiger:
    engineConfig:
      cacheSizeGB: 8
systemLog:
  verbosity: 1
  traceAllExceptions: false
  destination: file
  path: /var/log/mongodb/mongod.log
net:
  port: [PORT_NUMBER]
  bindIp: [PUBLIC IP, OR DOMAIN NAME]
operationProfiling:
  slowOpThresholdMs: 2100
replication:
  oplogSizeMB: 1024
  replSetName: rs0
  enableMajorityReadConcern: false