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 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。
• 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。
• 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。
• Use oncheck-pt to check on the number of partition extents after defragmentation.
  可在碎片整理完成后，利用oncheck-pt来检查分区区段的数量。
• Although you can allocate additional extents, the blocks themselves are allocated separately.
  尽管你可以进行额外的扩展，但是块本身是被隔开分派的。
• This feature checks the consistency and the corruption on data and extents, which is currently done through the oncheck utility.
  这个特性检查数据和区段的一致性和损坏，当前这是通过oncheck实用程序完成的。
• For maximum efficiency, frequently accessed tables should have as few extents as possible.
  为达到效率最大化，频繁访问的表区段应当越少越好。
• When using circular logging log file extents are reused once they no longer contain active log data.
  使用循环日志记录时，当日志文件扩展不再包括活动数据日志时，会将其进行重新使用。
• 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。
• 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。