Replication brings certain drawbacks, one of which is replication delay or lag. The replication process undergoes an inevitable delay while replicating large chunks of data across servers. There are plenty of factors that increase replication delay. First is network latency which comes into the picture when dealing with MongoDB databases. In MongoDB instances, where continuous replication occurs, the only way to communicate is through the network. However, if the replication needs aren’t fulfilled, there is a chance of network delay. Thus, make sure to always work with suitable bandwidth. The second way is heavy workloads. Replication operations are often delayed when long-running heavy operations take place. Therefore, using MongoDB Write Concern could be an effective solution. The next is database operations, which can sometimes be very slow to operate. However, for a few of them, the time taken could be longer than others. A database profiler helps to optimize accordingly based on the queries we feed.