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1ãDUMPåºæ§å¶æ件
alter system (session) set events 'immediate trace name controlf level 10'
2ãDUMPåºæ¥å¿æ件åæ
alter system dump logfile logfilename;
3ãDUMPåºæ¥å¿æ件头åæ
alter session set events 'immediate trace name REDOHDR level 10'
4ãDUMPåºLIBRARY CACHE
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