[nimrody]

Won't work for SSL encrypted connections (but, yes, this does add some latency)

[ranger_danger]

eBPF will: https://eunomia.dev/tutorials/40-mysql/

[tudorg]

Even then, though, it needs to run on the server so it's hard to guarantee to not impact performance and availability. There are many Postgres/Mysql proxies used for connection pooling and such, so at least we understand their impact pretty well (and it tends to be minimal).