On Tue, Oct 8, 2013 at 3:05 PM, 高健 <luckyjackgao@gmail.com> wrote:
> Hello:
>
>
>
>
>
> Thank you all for kindly replying my question.
>
>
> I read the documentation about pg_basebackup.
>
>
> The description says:
>
> The server must also be configured with max_wal_senders set high enough to
> leave at least one session available for the backup.
>
> Dose it mean:
>
> If I am building a one master -- one slave environment, I need the
> max_wal_sender to be at least 2.
>
> But I think pg_basebackup just use the one sender process temporarily, Is
> that right?
>
Yes. It would be used for the duration of backup. But, it maybe better
to just reserve one slot for pg_basebackup if you intend to use it
often instead of editing postgresql.conf every time you need to take
backup.
--
Amit