Oracle vs SQL Server vs MySQL vs Postgres

Examples

• SQL Server by default is missing row level locking (OMG! of course you can turn it on at a cost)
• Postgres , any open transaction, be it "create table foo(id int); select * from foo; " tanks performance for everyone on the DB doing transactions, everyone.
• Postgres - you wrap your transaction IDs and your database goes down a day or two
• MySQL has similar issue with "create table foo(id int); select * from foo; " where the history length list grows.
• MySQL wait events are worthless. the main wait, like 80% of all waits is a CPU, IO and LOCK all rolled into one, yes indeed, worthless OMG