On Sun, Jun 26, 2016 at 7:39 PM, Ian Barwick <ian@xxxxxxxxxxxxxxx> wrote:
On 06/27/2016 06:33 AM, Patrick B wrote:
...I'd like to have the wal_files stored for 24h, and then thepg_archivecleanup could do its job and delete the files..
*You cannot do that, but you can change the wal_keep_segments
<https://www.postgresql.org/docs/9.4/static/runtime-config-replication.html#GUC-WAL-KEEP-SEGMENTS>
on the master and reload the postgresql.conf.*
*https://www.postgresql.org/docs/9.4/static/runtime-config-replication.html#GUC-WAL-KEEP-SEGMENTS
<https://www.postgresql.org/docs/9.4/static/runtime-config-replication.html#GUC-WAL-KEEP-SEGMENTS>*
ok.. my current wal_keep_segments is:
wal_keep_segments = 256
That means there will be at least 256 files before postgres delete them?
Ok.. my mistake.. I'm running PostgreSQL 9.2 in a Centos 6.7 64 bits.
Please, in the future, remember to state your *PostgreSQL version and O/S*
as options can change.
FYI PostgreSQL 9.4 and later provide "replication slots", which will ensure that all WAL
files are kept until no longer required by standbys:
https://www.postgresql.org/docs/current/static/warm-standby.html#STREAMING-REPLICATION-SLOTS
This removes the need for guesswork on how much WAL to retain, though you do then need to be
careful that all standbys are actually consuming WAL otherwise files will be retained for ever
(or until disk space runs out, whichever comes first).
Regards
Ian Barwick
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Patrick
>So I've made a bash script to do the work for me.
>So I've made a bash script to do the work for me.
>The script will only delete the wal_files older than 24h ( -mmin +1440 )
It may be working, but that is not the supported method for wal file retention. The correct thing to do is just
incrtease the wal_keep_segments as per the documentation https://www.postgresql.org/docs/9.2/static/runtime-config-replication.html
>FYI PostgreSQL 9.4 and later provide "replication slots", which will ensure that all WAL
>files are kept until no longer required by standbys:
>FYI PostgreSQL 9.4 and later provide "replication slots", which will ensure that all WAL
>files are kept until no longer required by standbys:
replication slots will not work, as you are on 9.2.
Melvin Davidson
I reserve the right to fantasize. Whether or not you
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I reserve the right to fantasize. Whether or not you
wish to share my fantasy is entirely up to you.
