Each memory block, when allocated, consists of a BufferBlockHeader header followed by a buffer block for storage of actual data.
每个内存块在分配时都包含一个bufferblockheader头，后面跟着一个用于存储实际数据的缓冲区块。
If per-CPU data is needed (as determined in the section header checks), a per-CPU block is allocated.
如果需要per - CPU数据(这在检查区段头时确定)，那么就分配per - cpu块。
The first column, usually with a header according to the block size data, shows the total size of the disk.
第一列通常具有与块大小数据相对应的标题，它显示了磁盘的总大小。
The header contains general block information, such as the block address and the type of segment (for example, data or index).
这部分的数据块包含了有关实际的行的信息（包括行数据区域每个行片段的地址）。
The header contains general block information, such as the block address and the type of segment (for example, data or index).
数据块的这部分包涵了关于数据块中拥有行的表的信息。
The header contains general block information, such as the block address and the type of segment (for example, data or index).
块首部包涵了一般的块信息，这些信息包涵诸如块地址以及段的类型（比如，数据或者索引）等。
The header contains general block information, such as the block address and the type of segment (for example, data or index).
块首部包涵了一般的块信息，这些信息包涵诸如块地址以及段的类型（比如，数据或者索引）等。
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