Re: BUG #6018: ctrl +C cause data inconsistent for sync standby

On Tue, May 10, 2011 at 11:38 AM, lxzou <zoulx1982(at)163(dot)com> wrote:
>  I am interested in standby function of PG, so i test the new feature about
> sync standby in PG9.1. I have a question, i install only one primary
> postgres and no standby server. When i execute an insert statement in
> primary, this statement was blocked. But when I press Ctrl + C in psql, the
> statement was commited. In my view, the walsender can't send the xlog to
> standby server, the statement should be rollback, but not commit; because
> this will cause the data between primary and standby inconsistent.

The transaction gets blocked by sync rep *after* it's committed on the
master. So, we cannot rollback such a transaction because it's already
been committed on the master (i.e., WAL has already been flushed to the disk).

Regards,

--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center