PostgreSQL paired with the PgBouncer connection pooler, ready to accept pooled connections the moment it boots.
PostgreSQL is a leading open source relational database. PgBouncer is a lightweight connection pooler that sits in front of it, multiplexing many short lived client connections onto a small pool of backend sessions. Together they give connection heavy applications a database that stays responsive when thousands of clients connect at once.
cloudimg ships PostgreSQL and PgBouncer preconfigured on a hardened, fully patched base, with the pooler running in transaction mode on its own port. Unique passwords for the database superuser and the pooler admin are generated on first boot with no default login, every connection is encrypted with a per instance TLS certificate, and 24/7 support is included.