This calculation takes into account all of the pages (index and data) that are cached by the buffer pool.
这个计算考虑了缓冲池高速缓存的所有页(索引和数据)。
2
The danger is that if you forget to take the available buffer space into account, you can still permit a buffer overflow attack even when usingstrncpy(3).
If you're one of those responsible types who balances a checkbook, you can try writing every purchase to the next dollar to create an invisible buffer in your account.