您好，
pg的page架构中各部分空间占用如下，请问opengauss的page架构中各部分空间占用是什么样的？
* +----------------+---------------------------------+
* | PageHeaderData | linp1 linp2 linp3 ... |
* +-----------+----+---------------------------------+
* | ... linpN | |
* +-----------+--------------------------------------+
* | ^ pd_lower |
* | |
* | v pd_upper |
* +-------------+------------------------------------+
* | | tupleN ... |
* +-------------+------------------+-----------------+
* | ... tuple3 tuple2 tuple1 | "special space" |
* +--------------------------------+-----------------+
* ^ pd_special
| |
阿迪
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zzt_2009(a)163.com
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