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redo log buffer 和rollback segment 到底是什么关系呀?
1. Server process acquires data and rollback blocks into the buffer cache (maybe from the Data files).
3. Store record in the redo log buffer for before and after image. -- ?????
4. Save rollback data into a rollback segment block buffer.
看不太明白,
可不可以举个例子说明一下到底什么数据放到redo log buffer,什么数据放到rollback segment block buffer中
rollback segment block buffer是一个什么样的区域,也在sga中吗?
commit的过程是不是就和rollback segment没有关系了? |
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