许多编程语言支持字段索引的概念，字段索引用于访问重复字段的特定实例。
Many programming languages support the concept of a field index for accessing a particular occurrence of a repeating field.
希望我们介绍的这些创建和使用函数索引的方法能够帮助您改善查询搜索的性能。
Hopefully by seeing the various ways that functional indexes are created and used, you will be able to use them to improve the performance of your query searches.
尽管Knuth曾经忠告我们：“不成熟的优化是问题的根源”，但索引的目的在于快速地找到信息，因此本专栏同时也将讨论性能问题。
While Knuth has justly warned that "premature optimization is the root of all evil," the whole point of an index is to find information fast, so this column addresses performance issues as well.
这种索引既能保证索引的全面性，又能提高系统检索效率。
This indexing can not only ensure the comprehensiveness of the indexes, but also enhance the efficiency of system retrieval.
增量备份允许只备份自上一次备份以来发生变化的索引和数据页。
Incremental backup allows you to back up only index and data pages that have changed since a previous backup.
我优先建立了完整和正确的术语表和索引。
I have made it a priority to have a complete and accurate glossary and index.
尤其是CSS属性的索引很有价值。
提高阅读理解的索引卡片法。
The Index Card Method for Increasing Your Reading comprehension.
因此我先发制人，在索引卡片上列出了我和他仍然应该约出去的原因。
So I took pre-emptive action, composing on index cards a list of reasons why he and I should still hang out.
您将有机会试用主索引页，并窥视一下部分组件在幕后是如何工作的。
You'll have a chance to try out the main index page, and then take a peek under the hood to see how some of the components work.
有一年，为了实现精确分组，德格拉卡在自家客厅地板上把标有学员名字及基本概况的索引卡摊了一地，试验了各种排列组合，最终使所有人员得到了均衡的分配。
One year, to get the study groups just-so, Ms. DeGraca laid out index CARDS with students' names and basic facts on her living room floor, mixing and matching until the groups seem balanced.
我将繁琐的讨论和数理推论中的精华写到了一张索引卡片上。
I distilled all that complex brainstorming and math into a single index card.
大约6个月前，我们决定开发一个全新的现代搜索框架，该搜索框架基于高性能的倒排索引，而非关系型数据库。
About 6 months ago, we decided to develop a new, modern search architecture that is based on a highly efficient inverted index instead of a relational database.
索引明显地增加了这本书的实用价值。
所以，与简单地优化索引相比，这里的设计决策更加复杂。对这些特性的使用必须加以协调，才能将性能发挥到极至。
So, design decisions are more complicated than simply optimizing indexes; the use of these multiple features must be coordinated to achieve full potential performance.
从技术的角度来看，倒排索引用于存储文档中出现的关键字，并且支持搜索，它是一种广为熟悉并且精确描述的数据结构。
From a technical perspective, the inverted index, used to store keywords that appear in documents and enable searches, is a well-known and well-described data structure.
我希望它的索引项有这个功能就好了，就是不用一页一页的找，你也可以直接跳到“p”字母打头菜谱的那一页(比如，法式炖锅potaufeu)。
I wish the index had a feature that allowed you to skip down to, say, the "p" s (pot au feu, anyone?) without scrolling laboriously page by page.
性能改进中最近人注目的莫过于代码索引时间下降了50%，同时借助于本地的Linux文件系统监视器实现了Linux上更快的项目同步。
Performance improvements most notably include a 50% reduction in code indexing time, as well as faster project sync on Linux with a native Linux file system watcher.
因为索引会带来额外的数据更新开销，所以应该争取创建少量索引来覆盖尽可能多的查询。
Because each index incurs extra data updating overhead, the goal should be to create a small number of indexes to cover as many queries as possible.
她的索引遍及95亿个网页，凭此，今天的网络世界中的其他任何搜索引擎也难以望其项背。
She indexes over 9.5 billion WebPages, which is more than any other search engine on the web today.
然而，在生产环境中，定义恰当的索引对于实现最优性能非常重要。
However, in production environments, defining appropriate indexes can be critical to achieving optimal performance.
函数索引是一种强大的性能调优工具。
Functional indexes can be a powerful performance tuning tool.
这批数量巨大的档案的1/4都已编了索引，可供研究者查阅。
A quarter of this vast archive has been indexed and made accessible to researchers.
准确的索引信息和统计信息是查询优化器中基于成本的决策的基础。
Accurate index information and statistics are fundamental to cost-based decisions in the query optimizer.
Google的搜索引擎缓存已经成为一件很有价值的搜索利器，因为用户可以利用此项功能穿越时间，找到也已不存在的页面。
Google's search engine cache has become one of the most valuable research features of Google search, since it enables users to travel back in time and find pages that may not exist anymore.
谷歌的搜索引擎在全球如此流行，以至于搜索变成了谷歌，而谷歌也变成了一个动词。
Google's search engine is so widespread across the world that search became Google, and google became a verb.
最初版本的MOG就包含这个工具，但现在速度提高到了原来的十倍，它可以在1小时内为10,000首歌建立索引，远远多于从前的1,000首。
This tool was also available in the first version of MOG but is 10 times as fast now, indexing 10,000 songs an hour compared with 1,000 songs previously.
布鲁克斯：我从小就爱收集地图，为了给这些地图做索引，我曾尝试了各种各样的方法，在这种不断的尝试过程中，我对自动数据检索的概念产生了浓厚兴趣。
Fred Brooks: I collected maps as a kid. I had tried all kinds of ways to index my map collection, which got me interested in the notion of automatic data retrieval.
布鲁克斯：我从小就爱收集地图，为了给这些地图做索引，我曾尝试了各种各样的方法，在这种不断的尝试过程中，我对自动数据检索的概念产生了浓厚兴趣。
Fred Brooks: I collected maps as a kid. I had tried all kinds of ways to index my map collection, which got me interested in the notion of automatic data retrieval.
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