[spidaman]

I use MySQL plenty and there's a lot of things I like about it. But I honestly don't understand any of the MySQL related comments on this post. Even if Oracle didn't own MySQL, a migration from Oracle to MySQL is significantly more difficult than one from Oracle to PostgreSQL. The poor join performance of MySQL make it doubtful that it could have ever been a serious discussion at Salesforce (to say nothing of the merits of mvcc and PostgreSQL's license).

[rimantas]

  > to say nothing of the merits of mvcc

I want to know more about the merits ov mvcc and why don't they apply to MySQL.

[lucian1900]

Because it doesn't do MVCC, it locks instead.

[seunosewa]

False. InnoDB does MVCC by default.