When to use MySQL vs PgSQL?
aditya: MySQLPros:* Easier to replicate (and hence to scale for some people)* Easier to find DBA's for* More popular (twitter, sixapart, etc. use them)Cons:* MyISAM is slow as hell* InnoDB is better but may have licensing issues* Oracle owns them now, unclear whether it is for better or for worsePgSQL:* Better performance of DB engine* Excellent query planner and analyzer* Rock-solid in most aspects, with the core team dedicated to putting out a good productCons:* Lack of a canonical, good, production-ready replication method (current choices: Slony, pgPool, Continuent, Londiste)* Hard to find good DBA's* Less popular to some extentThere you go. Maybe it boils down to performance (pgsql) vs replication (mysql), but that's just from what I know...