还有一些代码通过使用影子页表(shadow page -table)和管理x86区段来提供内存映射。
There's code to provide the memory mapping through the use of shadow page-tables and management of x86 segments.
为达到效率最大化，频繁访问的表区段应当越少越好。
For maximum efficiency, frequently accessed tables should have as few extents as possible.
这指出了销售表包含三个区段。
图35说明如何对数据和区段执行一致性和损坏检查，并把检查范围收缩到表级。
Figure 35 indicates how to enact a consistency and corruption check on data and extents, narrowing down the filter to the 'table' level.
通过dms表空间，DB2更加可以控制如何将数据页面物理映射到称作区段的磁盘空间分组中。
With DMS tablespaces, DB2 has more control over how data pages are physically mapped in disk space groupings known as extents.
可以看到，该表中有三个区段。
如果表拥有太多区段，那些区段就很可能是交错的。
If tables have too many extents, it is very likely that those extents are interleaved.
否则，其数据或键将分散在该表或索引所占用的所有区段中。
Otherwise, its data or keys will be scattered throughout the extents that have been occupied by the table or index.
dbspace区段列表提供的信息包括表名、区段的起始地址和结束地址以及与它们相关联的大小。
The dbspace extent listing includes the name of the table, the start and end addresses of the extent, and the sizes associated with them.
很不幸，dbaccessdemo_ud所创建的表很短，而且有时在特定环境下可能仅包含一个区段。
Unfortunately, tables created by dbaccessdemo_ud are short and sometimes may only have one extent in certain circumstances. To view the extents in this table run the following command.
在SiteProperties区段中，单击EditTemplateMapping，添加表3所示的创作模板和表示模板的映射。
In the Site Properties section, click Edit template mapping Add the mappings of authoring template and presentation template as listed in table 3.
主要是从这两个方面入手，研究出新型适应于分区段、防非正常用电等功能的电能表以满足现场急需。
The paper presents a new type of watt - hour meter which has the function of zone - crossing meterage, can prevent abnormal usage of watt - hour meter, and also can satisfy the consumer.
主要是从这两个方面入手，研究出新型适应于分区段、防非正常用电等功能的电能表以满足现场急需。
The paper presents a new type of watt - hour meter which has the function of zone - crossing meterage, can prevent abnormal usage of watt - hour meter, and also can satisfy the consumer.
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