Cache hit ratio below 70% indicates inefficient caching

Cache hit ratio (hits / (hits + misses)) stays below 70% for sustained period. Should be above 80% for most applications. Low ratio means TTLs are too short, cache is invalidated too aggressively, or wrong data is being cached.

Calculate hit ratio from django_cache_get_hits_total and django_cache_get_misses_total metrics. Review cache key patterns and TTL settings. Increase TTL values if data staleness is acceptable. Reduce aggressive cache invalidation. Consider warming cache on application startup for frequently accessed data.