B.2. Anti-patterns

MongoDB lacks constraints, which can lead to poorly organized data. Here are a few issues commonly found in problematic production deployments.

B.2.1. Careless indexing

When users experience performance problems, it’s not unusual to discover a whole slew of unused or inefficient indexes. The most efficient set of indexes for an application will always be based on an analysis of the queries being run. Be disciplined about the optimization methods presented in chapter 7.