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。
• 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。
• 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。
• This indicates that the sales table contains three extents.
  这指出了销售表包含三个区段。
• 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。
• Secondary log file extents are allocated dynamically by the queue manager when the primary files are exhausted.
  次日志文件扩展由队列管理器在主文件耗尽的情况下动态分配。
• When using linear logging on the other hand log file extents will be continually allocated as required.
  另一方面，使用线性日志记录时，将根据需要继续分配日志文件扩展。
• 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。
• 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。
• 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。