numerical primary key vs alphanumerical primary key - Mailing list pgsql-performance

Hi,

I have read a lot of different information about the benefits of using numerical primary key vs alphanumerical primary key(small size). And what I am gathering is that for performance there is no more great advantage.

It seems like now RDBMS in general, postgres in particular handles pretty well joins on text indexes.

Did I understand correctly?

Thanks,

Anne