Re: Deleting old WAL-files

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Thank you all for great answers and pointing me to the relevant documentation!

Regards,
Gustav


On May 19, 2015, at 3:29 PM, Gilberto Castillo <gilberto.castillo@xxxxxxxxx>
 wrote:

> 
> 
>> Gustav Karlsson wrote:
>>> I am looking for a good method of determining what WAL-segments can be
>>> deleted from our backup-
>>> archive.
>>> 
>>> We are using Postgresql 9.3 and do nightly basebackups along with
>>> archiving of WAL-segments.
>>> 
>>> We would like to prevent our backup-archive from growing forever, and
>>> thus delete basebackups and WAL-
>>> segments older than say 1 year.
>>> 
>>> Is there a good way of finding the oldest WAL-segment needed for a given
>>> basebackup? (If not, what is
>>> the typical method for deleting old WAL-segments?)
>> 
>> The backup contains a file "backup_label" which contains a line like
>> 
>> START WAL LOCATION: 0/83000028 (file 000000010000000000000083)
>> 
>> That is the oldest file needed for recovery.
>> 
>> But a simple solution would be to keep WAL archives for one day more than
>> your oldest
>> base backup, that way you can never miss a WAL archive that you need.
> 
> See you:
> 
> http://www.postgresql.org/docs/current/static/pgarchivecleanup.html
> 
> 
> 
> Saludos,
> Gilberto Castillo
> ETECSA, La Habana, Cuba
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