> GUIDs are so much better it's not even a contest GUIDs require more storage, and are likely (definitely with v4 GUID) to lead to index fragmentation. Postgr

> GUIDs are so much better it's not even a contest GUIDs require more storage, and are likely (definitely with v4 GUID) to lead to index fragmentation. Postgres requires an extension to do most useful things with GUIDs whereas SERIAL is ready to go. I'm very pro-GUID yet don't universally prefer them in databases.