The database server manages the allocation and de-allocation of memory in this portion.
数据库服务器在虚拟区中管理内存的分配和解除分配。
However, this case — where a class manages its own memory — is one of the very few situations where explicitly nulling objects that are no longer needed is a good idea.
但是这种情况——由类管理其自己的内存——是一种非常少见的情况,即显式地消除不再需要的对象是一个好主意。
For efficiency, given the way that the hardware manages virtual memory, memory is managed in what are called pages (4kb in size for most architectures).
为了提高效率,如果由硬件管理虚拟内存,内存是按照所谓的内存页方式进行管理的(对于大部分体系结构来说都是4kb)。
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