when does caching become a performance bottleneck

hey everyone, i've been thinking about caching lately. we all know it's great for speeding things up, but i've seen a few situations where our caching strategy itself started to cause problems. sometimes it feels like we're spending more time managing the cache than we are getting actual performance benefits. has anyone else run into this? what are the signs that your caching is actually slowing things down or becoming a management headache? looking for some real-world examples and advice on how to identify and fix this