Database effects of changing OS time

Hi all,
Does anyone know or have any links to articles that specfiy whether changing the OS time (putting it back in time) will effect the database in any way? Mainly I would just like to know whether or not the database will continue to run normally.
I believe that doing this shouldn't cause any problems and the only things that might be problems are doing point in time recovery.
My Oracle versions are: 9.2.0.6 and 10.2.0.2
OS: Solaris 10
I appreciate your thoughts.
Thanks,
Dave

Hi,
"Following a time change where the clocks go back in time there is a window where INCOMPLETE recovery using TIME BASED recovery is affected."
In addition, try take a research about "How Does Daylight Savings Time Affect The Database?" or take a look at Note:1013279.6 from Oracle Metalink.
Cheers
Legatti

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Is there any impact on database if we change the time of server?

Hi,
Our DB server time is 45 minutes ahead of our application server. We have planned to reset the time of database server. Is there any impact on database if we change the timing of the server?
Platform: Solaris
DB version: 10.2.0.2.0
$ bash
bash-3.00$ date
Thu Apr 23 20:26:19 IST 2009
bash-3.00$ sqlplus /nolog
SQL*Plus: Release 10.2.0.2.0 - Production on Thu Apr 23 20:27:15 2009
Copyright (c) 1982, 2005, Oracle. All Rights Reserved.
SQL> conn /as sysdba
Connected.
SQL> select sysdate from dual;
SYSDATE
23-APR-09
SQL> select systimestamp from dual;
SYSTIMESTAMP
23-APR-09 08.27.53.250947 PM +05:30

That's an application question, not an Oracle question.
Oracle doesn't care what time it is or when the time changes. Your application(s), however, may care. If you use SYSDATE to populate a row and rely on the date later to be unique or to indicate the actual order rows were inserted, changing the date on the server, particular moving it backwards, might cause problems for your application. Does your application have problems running during daylight savings time changes?
Justin

Change server time

Hi to all,
I have 10.2g database on a Windows Server 2003 in production.
What would be the impact on the database if I change server time i.e. if I roll the clock backwards?
My database server takes time from my DC server and I wont to roll the clock backwards on DC server.
Thanks!

871486 wrote:
Hi to all,
I have 10.2g database on a Windows Server 2003 in production.
What would be the impact on the database if I change server time i.e. if I roll the clock backwards?
My database server takes time from my DC server and I wont to roll the clock backwards on DC server.
Thanks!The schedulers will be affected. I mean by the schedulers; Oracle defined schedulers (maintenance window, etc...) and user defined schedulers.

Change server time will change database time?

If a change my unix hour (because summer hour) the database will change without any commands or i need to do something?
Tks,
Elber.

Yes, SYSDATE will pick up the underlying operating system's date and time.
If you are changing the time zone in which the server resides, though, make sure that the operating system time zone and the database time zone are in sync if you are using any TIMESTAMP columns.
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Hi
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Change system time in RAC cluster

Hi,
We need to change the system time of two nodes involded in a RAC cluster, both the nodes are almost 15 minutes ahead of real time but are in sync with each other.
Does Oracle database require to bounce to get the latest changed time?
or does the whole cluster services needed to be stopped for 15 minutes after changing the time and then started? just in case not to confused with the transactions happened when the system was 15 minutes ahead.
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Your RAC Cluster would be using either of
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b. Oracle Cluster Time Synchronization Service -- part of the Oracle Grid Infrastructure
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How change 'home' time-zone in ical?

Hi
Question ... how to change 'home' time-zone in ical?
I have just relocated countries ... to a different time zone.
I use time-zone support in iCal and add time-zone to various tasks.
But when i add a task and note it as my now current time-zone then ical immediately alters the diary placement to assume that i am in my old country/time-zone.
I have altered the region in Preferences/International but this seems to have no effect, in ical at least.
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ross

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Change oracle time and timezone

Hi..
I have a few question on oracle time, the question are:-
How to change oracle time ?
How to change oracle timezone setting ?
Is it we have to reboot the system after the changes ?
Thank you,
Baharin

Hi..
This is my oracle time using command line :-
sqlplusSQL*Plus: Release 10.2.0.3.0 - Production on Wed Apr 14 16:10:00 2010
Copyright (c) 1982, 2006, Oracle. All Rights Reserved.
Enter user-name:
Enter password:
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - 64bit Production
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Refer the below two links
http://blog.sqlauthority.com/2014/02/15/sql-server-get-current-timezone-name-in-sql-server/
Check this link
http://dba.stackexchange.com/questions/39421/how-to-handle-timezone-properly-in-sql-server
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snapshot of problem:
http://imglink.ru/show-image.php?id=e7a096115a6371ffab46c701f8e470ba
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http://imglink.ru/show-image.php?id=ef65a38bdf7fc77eb9a71ec5c3ad5603
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Database effects of changing OS time

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