dont have a clue about cache invalidation strategies for real-time updates, lol. sorry!

so, we're trying to make our real-time data feeds better, and cache invalidation is really giving us a headache. we're using Redis for the cache, but honestly, keeping it updated when the database changes all the time? that's the tricky part. what do you all usually do for cache invalidation when things move really fast? any specific tricks or tools that work well, other than just setting a time-to-live? excited to hear what you've tried