Please see answers below and let me know if you have any other questions.

Best,
--

SHIRLY RADCO

BI SENIOR SOFTWARE ENGINEER

Red Hat Israel



On Sun, Oct 28, 2018 at 12:55 PM fsoyer <fsoyer@systea.fr> wrote:
Well, I see that I'm late to give the information :) Thank you to pointing me to this, but I have now some other questions now...
How can I see the timezone of the DB ?

"If no time zone is stated in the input string, then it is assumed to be in the time zone indicated by the system's TimeZone parameter, and is converted to UTC using the offset for the timezone zone."
 
When it says "all machines", do you confirm that this is physical machines, not VMs ?

I mean the machine DWH is installed on. It can be a VM.
But I'm not saying we recommend all VMs to be set to UTC.
 
May I apply the solution given on access.redhat or not, as there is no more messages since 3AM ?

No need. 

And, last question but not least, can this timezone be changed on the machines (and DB ?) without issue ?
 
It is possible to update it, but its not mandatory.

The 1 hour gap / overlap is expected when moving from summer to winter and back when not using UTC and I'm not sure if its even worth updating at this point,
at the risk of ending up with a real bug.. 

--

Regards,

Frank



Le Dimanche, Octobre 28, 2018 11:40 CET, Shirly Radco <sradco@redhat.com> a écrit:
 
Hi,
 
Please see here
 
"It is recommended that you set the system time zone for all machines in your Data Warehouse deployment to UTC. This ensures that data collection is not interrupted by variations in your local time zone: for example, a change from summer time to winter time."
 
What timezone is your DB configured to?
 
Best,
 
--

SHIRLY RADCO

BI SENIOR SOFTWARE ENGINEER

Red Hat Israel

 
On Sun, Oct 28, 2018 at 12:32 PM fsoyer <fsoyer@systea.fr> wrote:
Hi all,
Maybe it has already been posted, but I think I've discoverd a little bug. This night I had this messages :

28 oct. 2018 03:00:00
ETL service aggregation to hourly tables has encountered an error. Please consult the service log for more details.
28 oct. 2018 02:40:27
ETL service sampling has encountered an error. Please consult the service log for more details.
28 oct. 2018 02:33:42
ETL service sampling has encountered an error. Please consult the service log for more details.
28 oct. 2018 02:27:42
ETL service sampling has encountered an error. Please consult the service log for more details.
28 oct. 2018 02:22:27
ETL service sampling has encountered an error. Please consult the service log for more details.
28 oct. 2018 02:16:37
ETL service sampling has encountered an error. Please consult the service log for more details.
28 oct. 2018 02:11:06
ETL service sampling has encountered an error. Please consult the service log for more details.
28 oct. 2018 02:05:06
ETL service sampling has encountered an error. Please consult the service log for more details.
28 oct. 2018 02:00:06
ETL service sampling has encountered an error. Please consult the service log for more details
28 oct. 2018 02:00:00
ETL service aggregation to hourly tables has encountered an error. Please consult the service log for more details.

and, coincidence, here in France we have change to winter hour at... 2AM :) So regarding this post:
https://access.redhat.com/solutions/3338001
speaking about a time problem, I've supposed that this is related ! No ? access.redhat says that the cause was not yet determined, but maybe it can be interesting to propose this cause ? But the bug is actually closed.

Question : does this repair all alone (as there is no more messages after 3AM) or may I applied the solution with postgres updates (I must say that I'm not very enthousiast for that...) ?

Regards,

--

Frank

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