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>> A 8-5 Temporary Tablespace [<a href=http://www.jsp001.com/forum/showthread.php?goto=newpost&threadid=616>查看别人的评论</a>]<br>
<hr><p>由 macro 发布于: 2001-03-05 20:37</p><p><img src="images/icons/icon14.gif" alt="Thumbs up" border=0> </p><p>1. Used for sort operations more efficiently <br>2. Cannot contain any permanent objects<br>3.Locally managed extents recommended<br>4.UNIFORM SIZE = SORT_AREA_SIZE * n<br><br>Locally managed temporary tablespaces have temporary data file (tempfiles),which are similar to ordinary data files except that:<br><br>1.Tempfiles are always set to NOLOGGING mode.<br>2.You cannot make a tempfile read-only.<br>3.You cannot rename a tempfile.<br>4.You cannot create a tempfile with the ALTER DATABASE command.<br>5.Media recovery does not recover tempfiles.<br>6.BACKUP CONTROLFILE does not generate any information for tempfiles.<br>7.CREATE CONTROLFILE cannot specify any information about tempfiles.<br><br>To optimize the performance of a sort in a temporary tablespaces,set the UNIFORM SIZE to be a multiple of the parameter SORT_AREA_SIZE.<br>__________________<br><br>谢谢你抽时间看我的发言，<br><br>Macro Zeng<br><br>==================================<br><br>我正在学习 Oracle ,坚持每天写读书笔记</p></td>
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