extents

英 [ɪksˈtɛnts]

美 [ɪkˈstɛnts]

n.  程度; 限度; 大小; 面积; 范围
extent的复数

计算机

双语例句

• Subsidies are used to varying extents in both market economies and in command economies.
  在市场经济和指令性经济中都存在不同范围的补贴。
• This indicates that the sales table contains three extents.
  这指出了销售表包含三个区段。
• If tables have too many extents, it is very likely that those extents are interleaved.
  如果表拥有太多区段，那些区段就很可能是交错的。
• Given this behaviour ensure that there are a reasonable number of secondary extents.
  此行为可确保有合理数量的次扩展。
• Extents are a collection of eight physically contiguous pages and are used to efficiently manage the pages.
  区是八个物理上连续的页的集合，用来有效地管理页。
• Log file extents can be specified as primary or secondary.
  日志文件扩展可以指定为主扩展或次扩展。
• The second problem, of course, is that a table or an index with many highly active extents will suffer from performance degradation due to increased disk head movement and increased contention for head positioning with other objects in the database.
  当然，第二个问题是，有很多高度活跃的盘区的一个表或索引将遭遇性能降低，因为磁头移动的增加和磁头与数据库中其他对象的位置争用的增加。
• The following illustration shows the sequence of pages used by the database engine to allocate and manage extents.
  下图显示了数据库引擎用来分配和管理区的页顺序。
• There are two problems with tables that have lots of extents, or at least there used to be.
  那些有很多盘区、或者至少曾经有过的表，存在两个问题。
• RESULTS Twenty dermal ulcer patients recovered, 6 mummification necrosis patients improved at some extents.
  结果26例中有20例皮肤溃疡者基本痊愈，6例干性坏疽者有不同程度的好转。