Here is an article on a recently discovered Oracle flaw, which allows SCN to reach its limit. http://www.computerworld.com/s/article/9223506/Fundamental_Oracle_flaw_revea led?taxonomyId=18&pageNumber=1 Please don't beat me for posting a link for an Oracle related article. If you despise a very notion of mentioning Oracle, please just don't read the post. This article may be interesting to any RDBMS professional, no mater what db flavor he/she is working with. Also, this story may be a lesson for the Postgresql community on how not do things. I'm not a developer, but it seems that having synchronized transaction id between let say streaming-replicated databases would give some advantages if done properly. Regards Igor Polishchuk -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general