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<HEAD><TITLE>论坛精华 >> Oracle 专栏 >> A 7-14 Possible LGWR Errors</title>
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>> A 7-14 Possible LGWR Errors [<a href=http://www.jsp001.com/forum/showthread.php?goto=newpost&threadid=597>查看别人的评论</a>]<br>
<hr><p>由 macro 发布于: 2001-03-04 14:30</p><p><img src="images/icons/icon7.gif" alt="Smile" border=0> </p><p>Unavailable Redo Log Members<br><br>The LGWR reacts differently certain online redo log members are unavailable.<br><br>1. If LGWR can access at lease one member in a group ,the writing to the accessible members of the group proceeds as usual;LGWR ignores the unavailable members fo the group.If the group was not active ---- that is ,the checkpoint was completed ---- the dropping and adding a new redo log member solves the problem .Otherwise,you have to first force a log switch.<br><br>2.If all members of the next group are inaccessible to LGWR at a log switch,the instance shuts down.If the group was not active,then dropping and adding a new redo log group solves the problem.<font color=red>If not, the database may need media recovery from the loss of an online redo log file.</font><br><br>3.If all members of the current group suddenly become inaccessible to LGWR as they are being written,the database instance shuts down.In this case,the database may need media recovery from the loss of an online redo log file.<br><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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