On Thu, Apr 20, 2017 at 3:50 PM, Fabrice Bacchella <
fabrice.bacche...@orange.fr> wrote:

> I tried to upgrade ovirt to version 4.1 from 4.0 and got:
>
>           Found the following problems in PostgreSQL configuration for the
> Engine database:
>            autovacuum_vacuum_scale_factor required to be at most 0.01
>            autovacuum_analyze_scale_factor required to be at most 0.075
>            autovacuum_max_workers required to be at least 6
>            Postgresql client version is '9.4.8', whereas the version on
> XXX is '9.4.11'. Please use a Postgresql server of version '9.4.8'.
>           Please set:
>            autovacuum_vacuum_scale_factor = 0.01
>            autovacuum_analyze_scale_factor = 0.075
>            autovacuum_max_workers = 6
>            server_version = 9.4.8
>           in postgresql.conf on 'XXXX'. Its location is usually
> /var/lib/pgsql/data , or somewhere under /etc/postgresql* .
>
> I'm a little afraid about that. Does ovirt want pg to lies about it's
> version ? It's a shared instance so what about other tools that access it ?
> Is there some explanation about the meaning of those values ?
>

engine-setup it's comparing the version of the local psql client with the
version reported by the remote postgresql server as for:
https://bugzilla.redhat.com/show_bug.cgi?id=1331168

Currently it's a strict comparison; maybe we should be more flexibly
regarding .z versions; Didi?

The other checks has been introduced for performance and scaling reasons.


>
> And it was not in the release notes, it's not funny to get this warning
> after starting the upgrade
>
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