[lukeschlather]

Is it speed of establishing a connection or does it affect pooled connections? What database engine are you using?

We abandoned cloudsqlproxy partially because the sidecar in Kubernetes caused random disconnects, but also because it just had bizarre network errors sometimes. (That was mostly when connecting from outside GCP though.)

[cbushko]

We are using PHP and thus no connection pools at all. This definitely doesn't help us with speed. With public IP there was some mystery point that just slowed everything to a crawl.

MySQL for our DB.