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ORA-00312: Áª»úÈÕÖ¾ 1 Ïß³Ì 1: 'D:\ORACLE\ORADATA\GOCOM\REDO01.LOG'
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SQL> startup;
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Total System Global Area 135338868 bytes
Fixed Size 453492 bytes
Variable Size 109051904 bytes
Database Buffers 25165824 bytes
Redo Buffers 667648 bytes
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ORA-00312: Áª»úÈÕÖ¾ 1 Ïß³Ì 1: D:\ORACLE\ORADATA\ORCL\REDO01.LOG'
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SQL>select * from v$log;
GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS FIRST_CHANGE# FIRST_TIME
---------- ---------- ---------- ---------- ---------- --- ---------------- ------------- ----------
1 1 0 104857600 1 NO UNCURRENT 670680 07-12ÔÂ-07
2 1 15 104857600 1 NO unactive 696119 07-12ÔÂ-07
3 1 0 104857600 1 NO Unactive 650182 07-12ÔÂ-07
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alter database clear unarchived logfile group 1; /*ÖØ½¨ÈÕÖ¾Îļþ*/
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alter database clear unarchived logfile group 2;
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alter database clear unarchived logfile group 3;
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Total System Global Area 135338868 bytes
Fixed Size 453492 bytes
Variable Size 109051904 bytes
Database Buffers 25165824 bytes
Redo Buffers 667648 bytes
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What circumstances we use ALL_ROWS and what circumstances we use FIRST_ROWS optimizer mode? This article is written in oracle9i.
First_rows attempts to optimize the query to get the very first row back to the client as fast as possible. This is good for an interactive client server environment wher ......