Spanner provides UNSPLITTABLE_REASONS in hotspot insights and

## Feature Feature Spanner provides `UNSPLITTABLE_REASONS` in hotspot insights and split statistics views to detect when splits can't be split further. Unsplittable reasons can help you identify schema anti-patterns that require intervention. For more information, see[Find hotspots in your database](https://cloud.google.com/spanner/docs/find-hotspots-in-database)and[Split statistics](https://cloud.google.com/spanner/docs/introspection/hot-split-statistics). This feature is [generally available (GA)](https://cloud.google.com/products#product-launch-stages).