Re: [GENERAL] non-zero xmax yet visible

2014-01-15 Thread Ming Li
On Wed, Jan 15, 2014 at 10:48 AM, Michael Paquier wrote: > On Wed, Jan 15, 2014 at 1:26 AM, Ming Li wrote: >> I'm a little bit confused by the meaning of xmax. >> >> The documentation at >> http://www.postgresql.org/docs/current/static/ddl-system-columns.html >> says >> "xmax >> >> The identity (

Re: [GENERAL] non-zero xmax yet visible

2014-01-14 Thread Michael Paquier
On Wed, Jan 15, 2014 at 1:26 AM, Ming Li wrote: > I'm a little bit confused by the meaning of xmax. > > The documentation at > http://www.postgresql.org/docs/current/static/ddl-system-columns.html > says > "xmax > > The identity (transaction ID) of the deleting transaction, or zero for > an undele