Re: Question about wal files / pg_xlogs

Hello!

As I can see files is delivered not with delay but with timeshift.

1. Can you show me restore_command on slave?

2. Also can you check archived WAL creation time on slaves in archive
location after you copied them with archive_command? Is in near WAL
creation time in pg_xlogs? Or different?

3. How do you check timezone equivalence between master and slave? What

Alex Ignatov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company

On 04.08.2016 05:21, Patrick B wrote:
> Hi all,
>
> I'm currently using PostgreSQL 9.2. I noticed that the wal_files are
> being generated by the master well, no problems. But on the slaves, it
> seems to be a delay to the delivery of those wal_files.
>
> I got two slaves using streaming replication and wal files shipment
> from Master.
>
> *On the master:*
>
> ls -ltr /var/lib/pgsql/9.2/data/pg_xlogs/
> Aug 4 02:18 000000020000159D000000D1
> Aug 4 02:18 000000020000159D000000D2
> Aug 4 02:18 000000020000159D000000D3
>
>
> select * from pg_current_xlog_location();
> 159D/D6C8DAF8
>
>
> So, seems to be ok.
>
>
> *On the slave:*
>
>
> ls -ltr /var/lib/pgsql/9.2/wal_archive:
> Aug 4 00:58 000000020000159C00000071
> Aug 4 00:58 000000020000159C00000072
> Aug 4 00:58 000000020000159C00000073
>
>
> See the time difference? 2 hours? It seems the files are being
> delivered with 2 hours delay.
>
> The streaming replication is working fine... But if that goes down,
> I'll need the wal_files up to date to recover the database.
>
> How can I see what's going on? What would be the steps? any tips?
>
> Cheers
> Patrick.