Percona Server vs. EDB Postgres Advanced Server

Percona Server for MySQL is a free, fully-compatible, enhanced, open-source drop-in replacement for MySQL. It provides superior performance, scalability, and instrumentation. With over 5,300,000 downloads, Percona Server’s self-tuning algorithms and support for extremely high-performance hardware delivers excellent performance and reliability Percona Server for MySQL delivers enterprise-grade features and higher uptime, along with a number of key benefits that improve database performance and efficiency.

EDB Postgres Advanced Server (EPAS) is based on open source PostgreSQL, the world's most advanced open-source database management system. EPAS gives you the best of both worlds - all the advantages of PostgreSQL, enhanced with mission-critical features that help you maintain greater consistency across your PostgreSQL deployments. EDB Postgres Advanced Server extends PostgreSQL with the security and performance features that enterprises need. It is also Oracle compatible.