[StorageEngine] 咨询page架构空间占用情况

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 | | zzt_2009@163.com |