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The article does not provide any clue whatsoever why they migrated to MariaDB whatsoever. The issues talked about may not even need Oracle support at all. Most issues pertain to Application SQL, bad data modelling and poor programming practices. Soon these practices will pop up in MariaDB as well and they will blame MariaDB! We have been using Oracle on Exadata for quite a while now and it's serving our need quite well, without much need for any cheap migration. So despite the rant made in the comment box Oracle is still the No. 1 DB.