OceanBase Database vs PgBouncer

OceanBase Database is a distributed database for transactional, analytical, and AI workloads in one system. Built-in compatibility with Oracle and MySQL is intended to simplify migration. Deployment choices include the open-source Community Edition, self-hosted Enterprise, and fully managed OceanBase Cloud across cloud providers. Documentation describes high availability and disaster recovery at node, data-center, and region levels. Linux installation packages are listed for Alibaba Cloud Linux, CentOS, Red Hat, Ubuntu, Debian, and Anolis OS. Docker deployment can be used on Windows and macOS, though the documentation cautions that this method has not been validated at scale. A standalone instance can be used for learning; production environments require at least three servers. Community Edition is free and includes full kernel capabilities. Enterprise pricing is available on request. Security features include role and permission management, network whitelists, encrypted communication, transparent data encryption, and SQL auditing, but Community Edition does not support security audit.

PgBouncer is a self-hosted connection pooler for PostgreSQL. It reuses server connections to lessen the performance cost of opening new ones, and offers session, transaction, and statement pooling. Statement pooling does not allow multi-statement transactions. PgBouncer can send connections to databases on different hosts, but it has no built-in multi-host load balancing or failover detection; DNS round-robin, external TCP load balancers, DNS changes, or external tools are described as alternatives. It can track protocol-level prepared statements in transaction and statement modes when max_prepared_statements is non-zero. Authentication options include client certificates, SCRAM-SHA-256, LDAP, PAM, and HBA-based configuration. The features page lists default memory needs of 2 kB per connection. PgBouncer is free, with source releases and references to native packages and RPM and Debian repositories. It runs on Linux and Windows; MinGW is the documented supported Windows build environment. Building requires Libevent 2.0 or later, pkg-config, and a C11-capable compiler; TLS support also requires OpenSSL.