用NBU恢复磁带中的ORACLE控制文件
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一.概要:1. Commit和log filesync的工作机制2. 为什么log file wait太久3. 如何去度量问题出在那里呢?二.log file sync等待的原因1. 默认情况下我们commit一个事务是要等待logfile...
** ** ** ** ** ** ** ** 一组LRU链表包括LRU主链,LRU辅助链,LRUW主链,LRUW辅助链,称为一个WorkSet(工作组)如下图: view plain copy–================================================== &#...
Archivelog generation on a daily basis:setpages 1000selecttrunc(COMPLETION_TIME,'DD')Day, thread#, round(sum(B...
Startup ** 1. Ensure that you are logged in as the _root _Linux/ UNIX user. If you are not connected as root OS user, yo...