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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

  • 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。
  • 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。
  • Three extents can be seen in this table.
    可以看到,该表中有三个区段。
  • To quantitatively determine urban land use extents and development densities, sub-pixel impervious surface areas were mapped for this area.
    为了量化城市土地利用程度和开发密度,对研究区基于子像元的非渗透表面丰度进行了分类。
  • These include pages allocations from both mixed extents and uniform extents.
    这些页包括从混合区和统一区中分配的页。
  • It also includes extents with multi-block and delayed block allocation for performance.
    它还包括多块和延迟块分配,以提升性能。
  • However, the REPACK option does not necessarily reduce the number of extents.
    然而,REPACK选项不一定减少盘区数量。
  • 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。
  • Ext4 replaces ext3's mechanism with extents to improve allocation and support a more efficient storage structure.
    ext4使用区段取代ext3的机制,从而改善了空间的分配,并且支持更加高效的存储结构。
  • 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。