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For ORA-01555,

原创 Linux操作系统 作者:beatony 时间:2011-12-30 03:47:04 0 删除 编辑

wdcps1062*\O02RCD1A-30: cat alert_O02RCD1A.log-3|egrep -i "Error|Fail|Invalid|ORA-|Global Enqueue Services Deadlock detected"

ORA-01555 caused by SQL statement below (SQL ID: cvvgqq7jch9ps, Query Duration=7795 sec, SCN: 0x090f.42a0e988):

 

For ORA-01555,

Cause: Rollback records needed by a reader for consistent read are overwritten by other writers.

Action: If in Automatic Undo Management mode
, increase the setting of UNDO_RETENTION. Otherwise, use larger rollback segments.

 

SQL> show parameter undo

 

NAME                                 TYPE        VALUE

------------------------------------ ----------- ------------------------------

undo_management                      string      AUTO

undo_retention                       integer     15000

undo_tablespace                      string      UNDOTBS1

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