Re: detecting binary backup in progress

On 2013-05-31 10:38:56 -0700, Joe Conway wrote:
> I can check for the presence of $PGDATA/backup_label in order to detect
> a backup in progress (i.e. pg_start_backup() has been run and
> pg_stop_backup() has not yet been run).
> 
> However there is a period of time after pg_start_backup() is first
> executed to when it completes, during which backup_label file does not
> exist yet, but the backup has essentially been started. Is there any
> way to detect this state?

9.3 has pg_is_in_backup() for that. I don't think there's a way to
detect it safely without C code before that.

Greetings,

Andres Freund

-- Andres Freund                       http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services