The overall buffer size has a significant effect on DB2 performance, because a large number of pages can significantly reduce I/O, which is the most time-consuming operation.
整个缓冲区大小对DB2性能有巨大影响，这是因为大量的页可以显著地减少I/O这一最耗时的操作。
There are two sorted arrays A and B of size mand n respectively. Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)).
这个题是求两个有序数组的中间数，其实这个中间数，如果是奇数，就是中间的那个数，如果是偶数，就是中间的两个数的和的平均值。
There are two sorted arrays A and B of size mand n respectively. Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)).
这个题是求两个有序数组的中间数，其实这个中间数，如果是奇数，就是中间的那个数，如果是偶数，就是中间的两个数的和的平均值。
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