Database Administration (MOSC)

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ora-12751

edited Apr 2, 2020 5:03AM in Database Administration (MOSC) 3 commentsAnswered

Environment:

AIX 7.2

OEE 12.2.0.1 (PSU Apr 2019)

All files (db files, controlf files and online log files) located on SAN (IBM Storwise V7000)

Symptoms:

Database hangs. Alert:

alert_errors
==========
Errors in file /u01/app/oracle/diag/rdbms/iabs/iabs/trace/iabs_m003_5571968.trc (incident=3341953):
ORA-00494: enqueue [CF] held for too long (more than 900 seconds) by 'inst 1, osid 14746498'
Incident details in: /u01/app/oracle/diag/rdbms/iabs/iabs/incident/incdir_3341953/iabs_m003_5571968_i3341953.trc
2020-02-27T22:16:57.418796+05:00
minact-scn: got error during useg scan e:12751 usn:71
minact-scn: useg scan erroring out with error e:12751
Suspending MMON action 'Block Cleanout Optim, Undo Segment Scan' for 104400 seconds

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