On Sat, Dec 19, 2009 at 10:58 AM, Clayton Graf <clayton.graf@gmail.com> wrote:
> Ok, but this is really my problem: I cannot perform an ALTER TABLE with the
> system in production mode, because the ALTER TABLE hangs due an
> AccessShareLock.
until the lock is released, are your selects all that long?
besides, why are you ALTERing the table in production... i guess
clients will suffer if the expect less or more columns than the ones
they receive from the ALTERed table
> We use two-tier mode,
don't understand this
> so is it necessary to shutdown all users before
> perform an ALTER TABLE?
no
--
Atentamente,
Jaime Casanova
Soporte y capacitación de PostgreSQL
Asesoría y desarrollo de sistemas
Guayaquil - Ecuador
Cel. +59387171157