pub fn install_shared_pool_registry()Expand description
Install the process-lifetime shared pool registry. Idempotent: calling it more than once is harmless (subsequent calls are no-ops and keep the first registry). Intended to be called once by a long-lived server embedder at startup, before serving requests.
After this is installed, pg_pool/pg_connect calls whose full connection
identity matches an already-open pool reuse it instead of opening a new one,
across requests and worker threads. The CLI never calls this, so the CLI
one-shot path is unchanged.