[adontz]

If one has CPU load for 50 pods, then it is not a usual project I guess? Average load should be thousands of requests per second I believe.

So the question is how many applications have CPU load for 50 pods but also cannot saturate a single database, so sharding is not considered yet? Gut feeling is that they are few, more like exceptions.

From my personal experience pgBouncer is used a lot when framework/library does not support application level pooling in the first place, and not so much when it does.