Re: wal_level not changing

On 04/09/2017 18:58, Sumeet Shukla wrote:
> Tried but does not work.
>
> I see below output when I check the status of the service.
>
> systemctl status postgresql-9.6
>
> *●*postgresql-9.6.service - PostgreSQL 9.6 database server
>
> Loaded: loaded (/usr/lib/systemd/system/postgresql-9.6.service; enabled; vendor preset: disabled)
>
> Active: *failed*(Result: exit-code) since Mon 2017-09-04 11:25:42 EDT; 27min ago
>
> Process: 28093 ExecStop=/opt/postgresql/9.6/bin/pg_ctl stop -m fast -w -D /data/9.6/data *(code=exited, status=1/FAILURE)*
>
> Process: 28052 ExecStart=/opt/postgresql/9.6/bin/pg_ctl start -w -t ${TimeoutSec} -D /data/9.6/data -l /data/9.6/data/pg_log/startup.log (code=exited, status=0/SUCCESS)
>
> Main PID: 28054 (code=exited, status=0/SUCCESS)
>
>
> Sep 04 11:25:36 ashprmlpdb-p05 systemd[1]: Starting PostgreSQL 9.6 database server...
>
> Sep 04 11:25:36 ashprmlpdb-p05 systemd[1]: Started PostgreSQL 9.6 database server.
>
> Sep 04 11:25:42 ashprmlpdb-p05 systemd[1]: *postgresql-9.6.service: control process exited, code=exited status=1*
>
> Sep 04 11:25:42 ashprmlpdb-p05 systemd[1]: *Unit postgresql-9.6.service entered failed state.*
>
> Sep 04 11:25:42 ashprmlpdb-p05 systemd[1]: *postgresql-9.6.service failed.*
>
>

Just check the value of your current wal_level
cat /data/9.6/data/postgresql.conf /data/9.6/data/postgresql.auto.conf | egrep -v '^#|^$' | grep wal_level | tail -1
and your max_wal_senders
cat /data/9.6/data/postgresql.conf /data/9.6/data/postgresql.auto.conf | egrep -v '^#|^$' | grep max_wal_senders | tail -1
Make sure this as suggested.
Then, for the moment try to start pgsql as :
/opt/postgresql/9.6/bin/pg_ctl start -w -D /data/9.6/data
echo $?
^^^ what does it return? How does your stderr say?

> Thanks & Regards,
> Sumeet Shukla
>
>
> On Mon, Sep 4, 2017 at 9:20 PM, Vasilis Ventirozos <v(dot)ventirozos(at)gmail(dot)com <mailto:v(dot)ventirozos(at)gmail(dot)com>> wrote:
>
> try ALTER SYSTEM set wal_level = 'minimal';
> and then restart , just make sure that archiving is disabled first.
>
> Vasilis Ventirozos
>
>
>> On 4 Sep 2017, at 18:42, Sumeet Shukla <sumeet(dot)k(dot)shukla(at)gmail(dot)com <mailto:sumeet(dot)k(dot)shukla(at)gmail(dot)com>> wrote:
>>
>>
>> Hi,
>>
>> update pg_settings set reset_val='minimal' where name='wal_level';
>>
>> ERROR:parameter "wal_level" cannot be changed without restarting the server
>>
>>
>> set wal_level='minimal';
>>
>> ERROR:parameter "wal_level" cannot be changed without restarting the server
>>
>>
>> update pg_settings set setting='minimal' where name='wal_level';
>>
>>
>> ERROR:parameter "wal_level" cannot be changed without restarting the server
>>
>>
>> Even after restarting and reloading the server multiple times the setting does not update and remains as below:
>>
>> show wal_level;
>>
>> +-----------+
>>
>> | wal_level |
>>
>> +-----------+
>>
>> | replica |
>>
>>
>> +-----------+
>>
>>
>>
>> Thanks & Regards,
>> Sumeet Shukla
>>
>
>

--
Achilleas Mantzios
IT DEV Lead
IT DEPT
Dynacom Tankers Mgmt