03 2013 档案
摘要：一、引言：[oracle@yft yft]$ oerr ora 0155501555, 00000, "snapshot too old: rollback segment number %s with name \"%s\" too small"// *Cause: rollback records needed by a reader for consistent read are// overwritten by other writers// *Action: If in Automatic Undo Management mode, incre
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