Alert Log:Warning: VKTM detected a time drift,Time drifts can result in an unexpected behavior such as time-outs.

Below message keeps repeating in Alert-log.

Warning: VKTM detected a time drift.
Time drifts can result in an unexpected behavior such as time-outs. Please check trace file for more details. This warning repeating in alert log file.

SOLUTION:

This problem is due to the Bug  – “TIME DRIFT DETECTED” APPEARS INTERMITTENTLY IN ALERT LOG”

To fix the issue download and apply patch 11837095 as available for your release or platform or enable event 10795 at level 2 to fix this problem.

alter system set event=”10795 trace name context forever, level 2″ scope=spfile

Then bounce the instance -shutdown & startup .

Note : This warning can be ignored if  it is harmless.