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Wrong System Date Can Lead to ORA-00600 [kcm_headroom_warn_1] (Doc ID 2147012.1)

Last updated on OCTOBER 09, 2019

Applies to:

Oracle Database - Standard Edition - Version 11.2.0.1 and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
NOTE: In the images and/or the document content below, the user information and data used represents fictitious data. Any similarity to actual persons, living or dead, is purely coincidental and not intended in any manner.

Symptoms

 

..
ALTER DATABASE OPEN
Beginning crash recovery of 1 threads
Started redo scan
Completed redo scan
 read 47814 KB redo, 3171 data blocks need recovery
Started redo application at
 Thread 1: logseq 18936, block 47431
Recovery of Online Redo Log: Thread 1 Group 3 Seq 18936 Reading mem 0
  Mem# 0: /<DIR>/redo03.log
Recovery of Online Redo Log: Thread 1 Group 1 Seq 18937 Reading mem 0
  Mem# 0: /<DIR>/redo01.log
Recovery of Online Redo Log: Thread 1 Group 2 Seq 18938 Reading mem 0
...
  Mem# 0: /<DIR>/redo02.log
Completed redo application of 33.06MB
Completed crash recovery at
 Thread 1: logseq 18938, block 306, scn 10191908075373
 3171 data blocks read, 3171 data blocks written, 47814 redo k-bytes read
************************************************************
Warning: The SCN headroom for this database is only -52488 hours!                                                                                    <<<<<<<<<<<<<<<<    PAST TIME SET due to OS system change.
************************************************************

followed by:

ORA-00600: internal error code, arguments: [kcm_headroom_warn_1], [], [], [], [], [], [], [], [], [], [], []

 

Changes

 System clock changed

Cause

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In this Document
Symptoms
Changes
Cause
Solution


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