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keep-alive A TCP/IP option that allows you to automatically check that remote nodes on idle connections are still functional. When you enable the KEEP ALIVE option, periodic "heartbeat" packets will be transmitted on idle SQL*Net connections. The remote node should return a timely acknowledgement.

kernel The core software that runs ORACLE Server.

kerning The adjustment made to the spacing between adjacent characters.

key The column or set of columns whose values are used to identify any row in a table. While not the same as an index, unique indexes are typically created on key columns. See also primary key, unique key, and foreign key.

key performance indicator A significant measure used on its own, or in combination with other key performance indicators, to monitor how well a business is achieving its quantifiable objectives.

keyboard map A chart or template for a particular type of terminal that associates the function keys with the standard functions for a program such as SQL*Forms.

keyword (1) A word that has a specific meaning in a computer language, such as SQL, and therefore cannot be used except in that context. See also reserved word. (2) Additional term that can be added to document records and used in searching. Typically a keyword would be used for classification of documents or to control the search vocabulary.

keyword-value pair The combination of a standard TNS keyword and a value, used as the standard unit of information in connect descriptors and many configuration files. Keyword-value pairs may be nested; that is, a keyword may have another keyword-value pair as its value.

kilobyte (Kb) A unit of computer memory equal to 1024 bytes, often rounded off to 1,000 bytes.




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