sdetable -o si_stats is a useful command line tool.
Build a Geoprocessing tool to report the same things.
ArcSDE 10.2
Layer Administration Utility
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Layer 2237 Spatial Index Statistics:
Level 1, Grid Size 4000
|-------------------------------------------------------------------|
| Grid Records: 105565 |
| Feature Records: 92519 |
| Grids/Feature Ratio: 1.14 |
| Avg. Features per Grid: 42.88 |
| Max. Features per Grid: 8022 |
| % of Features Wholly Inside 1 Grid: 91.82 |
|-------------------------------------------------------------------|
| Spatial Index Record Count By Group |
| Grids: <=4 >4 >10 >25 >50 >100 >250 >500 |
|---------- ------ ------ ------ ------ ------ ------ ------ ------ |
| Features: 92225 294 98 20 8 2 0 0 |
| % Total: 100% 0% 0% 0% 0% 0% 0% 0%|
|-------------------------------------------------------------------|