Re: How to check streaming replication status

On 31-08-2017 11:24, Glyn Astill wrote:
>> From: Condor <condor(at)stz-bg(dot)com>
>> To: "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
>> Sent: Thursday, 31 August 2017, 08:36:19 GMT+1
>>
>> after a hour I get error message on slave server:
>>
>> LOG: restored log file "000000010000008B000000DC" from archive
>> LOG: restored log file "000000010000008B000000DD" from archive
>> cp: can get attribute '/archive/000000010000008B000000DE': No such
> file or directory
>> LOG: started streaming WAL from primary at 8B/DD000000 on timeline
> 1
>
> So it read all the log from the archive then started streaming, if
> there are no futrher messages you're ok.
>
> ...
>
>> and after I did it, got:
>>
>> STATEMENT: SELECT pg_current_xlog_location()
>> ERROR: recovery is in progress
>> HINT: WAL control functions cannot be executed during recovery.
>>
>> My question is: How I can check the replication status when the
> slave
>> does not accept connections ?
>
> That's right for a server in recovery you need to call
> pg_last_xlog_receive_location() or pg_last_xlog_replay_location() to
> get the current xlog position.

Yes,
but my question is how to call them when Im unable to connect with slave
even when
replication is over. How I can ask the slave server: Are you in recovery
mode ?
What is the last wal file send from master, which file you processing
now ?
How far behind you ?

As I ask: My question is: How I can check the replication status when
the slave does not accept connections ?