Atlas Search M0 (Free Cluster), M2, and M5 Limitations

The following limitations apply to Atlas Search on M0, M2, and M5 clusters only:

• You cannot create more than:
  • 3 indexes on M0 clusters.
  • 5 indexes on M2 clusters.
  • 10 indexes on M5 clusters.
• When you reach the maximum number of indexes allowed for the cluster tier, you can upgrade your cluster tier to create additional indexes. If you upgrade your cluster tier, the indexes are rebuilt on the new cluster tier.
• An index definition JSON object cannot exceed 3KB in size.
• You cannot add analyzer definitions to your indexes on the cluster. The Define Analyzers button is visible, but disabled.
• Index builds with more than 300 fields fail.
• Lucene's default clause limit of 1024 applies to any BooleanQuery created for searches.