以往大部分学者都集中研究磁盘索引，但其实在目前大内存的环境下对内存索引的研究也是非常必要。
For a long time researchers only focus on disk-based index, but research on memory-based index is of great value today because of the mass memory condition.
重新构建视图时，这些索引会占用服务器上的磁盘空间和处理时间。
These indexes take up disk space and processing time on the server when the views are rebuilt.
提供了新的目录视图，可以返回有关实际为索引和数据分配的磁盘的信息。
New catalog views were provided to return information about the actual disk allocations for indexes and data.
请注意，可以根据很多不同的源(例如，RAM磁盘)进行反向索引。
Note that you can back indexing by many different sources, for example, a RAM disk.
大多数情况下，对于通过索引定位的每一行，都必须进行单独的磁盘访问来读取该页。
In many cases, a separate disk access must be made to fetch the page for each row located through an index.
数据库提出了不同的、独特的要求，如果可能，您的索引和重做日志也应该位于不同的物理磁盘。
Databases pose separate, unique challenges so, if possible, your indexes and redo logs should also reside on separate physical disks.
数据库具有独特的困难；如果可能，索引和重做日志也应该位于不同的物理磁盘。
Databases pose separate, unique challenges; so, if possible, your indexes and redo logs should also reside on separate physical disks.
那时候搜索索引就运行在象乐高玩具一样的方块围住的磁盘驱动器里面。
The search index sat on a small number of disk drives enclosed within Lego-like blocks.
这个设置控制NSF缓冲池的大小，后者是用于缓冲NIF索引函数与磁盘存储之间的I/O传输的一部分内存。
This setting controls the size of the NSF buffer pool, a section of memory dedicated to buffering I/O transfers between the NIF indexing functions and disk storage.
新的XML数据和索引压缩支持可以减少所需的磁盘空间，可以提高受I/O 限制的操作的运行时性能。
New compression support for XML data and indexes reduces disk space requirements and can improve runtime performance of I/O-bound operations.
而且，我们希望限制用于建议的索引的磁盘空间。
Also, we want to limit the amount of disk space used for the recommended indexes.
该技术的另一个好处是节省磁盘空间，因为其索引结构更小。
Another benefit of this technology is that there is a savings in disk space, due to one less index structure.
因为db2缓冲池是系统主内存的一部分，DB 2数据库管理器在它读取或写入磁盘介质时将它分配给缓存表和索引数据。
Since a DB2 buffer pool is a part of the main memory of the system, the DB2 database manager allocates it for caching tables and index data when it reads or writes to and from media disks.
数据和索引页面的击中率反映了缓冲池在不需要磁盘I/O的情况下直接处理一个页面请求的时间量。
The hit ratios for data and index pages reflect the number of times a page request was handled by the buffer pool directly without requiring disk I/O.
磁盘访问率和配置影响数据库、视图打开和集合导航(查看索引)的速度。
Disk access rates and configurations affect the speed of database and view opening and of opening and navigating a collection (view index).
简单的数据库端问题，比如磁盘变慢或索引丢失，常常是引起问题的真正原因。
Simple database-side problems such slow disks or missing indices can be the actual culprit.
应当有多个磁盘用于DB 2日志、表和索引。
There should be multiple disks for the DB2 logs, for tables, and for indexes.
将数据、索引和日志散布在多个磁盘上，日志使用的磁盘应不同于其他东西使用的磁盘。
Spread data, indexes, and log over multiple disks, with the log on different disks from the others..
当你需要索引大量的文件时，你会注意到索引过程的瓶颈是在往磁盘上写索引文件的过程中。
When you need to index a large number of documents, you'll notice that the bottleneck of the indexing is the process of writing the documents into the index files on the disk.
WriteIndexInterval设置将索引写入磁盘的时间间隔(秒)。
WriteIndexInterval sets how often to write the index to disk (in seconds).
索引项占用的磁盘页数目。
IndexWriter公开了几个控制如何在内存中缓存索引并写入磁盘的字段。
IndexWriter exposes several fields that control how indices are buffered in the memory and written to disk.
幸运的是，Lucene的类IndexWriter提供了三个参数用来调整缓冲区的大小以及往磁盘上写索引文件的频率。
Fortunately, Lucene's IndexWriter class exposes three parameters to let you adjust the size of the buffer and the frequency of the disk writes.
MDC是一种索引化(indexing)类型，它通过减少访问数据时需要的磁盘读取次数，以及通过提高磁盘输入输出所需要的速度来提高性能。
MDC is a type of indexing that improves performance by reducing the amount of disk reads needed to access data, and by improving the speed of required disk input and output.
所有数据库表和索引都放在内存中，而且永远不会保存到磁盘上。
All database tables and indexes are kept in memory and never saved to disk.
这个公式会准确地返回您想要的一组文档，这样一来，视图的索引时间和磁盘空间需求便得到了满足。
This formula gives you the exact set of documents you seek, so your view indexing and disk space requirements are minimized.
静态文件、模板和代码都来自磁盘，组成数据库的数据表和索引也来自磁盘。
Static files, templates, and code are served from disk, as are the data tables and indexes that make up the database.
它是处理磁盘上的文件系统的基础，因为它定义文件系统的管理参数(例如，块的总数、空闲块和根索引节点)。
It provides the basis for dealing with the on-disk file system, as it defines the file system's managing parameters (for example, total number of blocks, free blocks, root index node).
这个参数决定了在Lucene的一个索引块中可以存放多少文档以及把磁盘上的索引块合并成一个大的索引块的频率。
This parameter determines how many documents you can store in the original segment index and how often you can merge together the segment indexes in the disk.
这个参数决定了在Lucene的一个索引块中可以存放多少文档以及把磁盘上的索引块合并成一个大的索引块的频率。
This parameter determines how many documents you can store in the original segment index and how often you can merge together the segment indexes in the disk.
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