Thread: WAL-dir filling up with wal_level = logical

Version: PG-10.4

 

I don't (yet) have any replication-slots configured, and hence no standbys are subscribed, but I have wal_level = logical configured to be able to add subscribers later. I'm seeing that WAL-dir is filling up with WAL-files (now 17GB and not declining), is this expected behaviour?

 

Thanks.

On 3 August 2018 12:12:33 CEST, Andreas Joseph Krogh <andreas@visena.com> wrote:
>Version: PG-10.4
> 
>I don't (yet) have any replication-slots configured, and hence no
>standbys are
>subscribed, but I have wal_level = logical configured to be able to add
>
>subscribers later. I'm seeing that WAL-dir is filling up with WAL-files
>(now
>17GB and not declining), is this expected behaviour?
> 

No. Maybe a not-working archive_command?


Regards, Andreas


--
2ndQuadrant - The PostgreSQL Support Company

On 3 August 2018 12:33:26 CEST, Andreas Joseph Krogh <andreas@visena.com> wrote:
>På fredag 03. august 2018 kl. 12:12:33, skrev Andreas Joseph Krogh <
>andreas@visena.com <mailto:andreas@visena.com>>:
>Version: PG-10.4
> 
>I don't (yet) have any replication-slots configured, and hence no
>standbys are
>subscribed, but I have wal_level = logical configured to be able to add
>
>subscribers later. I'm seeing that WAL-dir is filling up with WAL-files
>(now
>17GB and not declining), is this expected behaviour?
> 
>Thanks.
> 
>Hm, a co-worker noticed that we have max_wal_size = 16GB, that might be
>the
>reason:-)
> 

Yes ;-)


Regards, Andreas


--
2ndQuadrant - The PostgreSQL Support Company

On Fri, Aug 03, 2018 at 12:40:16PM +0200, Andreas Kretschmer wrote:
> On 3 August 2018 12:33:26 CEST, Andreas Joseph Krogh <andreas@visena.com> wrote:
>>Hm, a co-worker noticed that we have max_wal_size = 16GB, that might be
>>the
>>reason:-)
>
> Yes ;-)

Worth mentioning that this is a soft size, and not a hard size, hence
depending on your worload you may see more WAL segments than what is set
in 16GB.  The docs mention that, so no need to be surprised.
--
Michael