ORA-00600  and Instance Failure From DBWx or LGWR Processes
(Doc ID 285991.1)
Last updated on MARCH 25, 2019
Applies to:Oracle Database - Enterprise Edition - Version 126.96.36.199 to 188.8.131.52 [Release 11.2]
Oracle Database - Enterprise Edition - Version 184.108.40.206 to 220.127.116.11. [Release 8.1.7 to 11.2]
Oracle Database - Enterprise Edition - Version 18.104.22.168 to 22.214.171.124 [Release 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Information in this document applies to any platform.
The following symptoms will be observed:
a) ORA-00600 or multiple occurences will be reported in the alert log.
b) LGWR or DBWx may terminate the instance.
The alert log might also show additional problems prior to the 600 error.
The stack will be similar to:-
... ksaamb ksasnd ksbasend kcrfws ...
The trace file(s) will report : KSAAMB: fatal error out of msg blks after 60 sec timeout
The key function that needs to be present in the stack trace is KSAAMB
In some cases specific information in the trace will show a section called 'Forward Links'
and if so please see the Notes/BUGS section at the end of this article for more specific
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