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Oracle® In-Memory Database Cache User's Guide
Release 11.2.1

Part Number E13073-08
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Oracle In-Memory Database Cache is an Oracle Database product option that is ideal for caching performance-critical subsets of an Oracle database into cache tables within TimesTen databases for improved response time in the application tier. Cache tables can be read-only or updatable. Applications read and update the cache tables using standard Structured Query Language (SQL) while data synchronization between the TimesTen database and the Oracle database is performed automatically.

Oracle In-Memory Database Cache offers applications the full generality and functionality of a relational database, the transparent maintenance of cache consistency with the Oracle database, and the real-time performance of an in-memory database.


This guide is for application developers who use and administer TimesTen, and for system administrators who configure and manage TimesTen databases that cache data from Oracle databases. To work with this guide, you should understand how relational database systems work. You should also have knowledge of SQL, and either Open Database Connectivity (ODBC), Java Database Connectivity (JDBC), or Oracle Call Interface (OCI).

Related documents

TimesTen documentation is available on the product distribution media and on the Oracle Technology Network (OTN):


TimesTen supports multiple platforms. Unless otherwise indicated, the information in this guide applies to all supported platforms. The term Windows refers to Windows 2000, Windows XP, Windows Server 2003, Windows Vista and Windows Server 2008 systems. The term UNIX refers to Linux, Solaris, HP-UX and AIX systems.

This document uses the following text conventions:

Convention Meaning
boldface Boldface type indicates graphical user interface elements associated with an action, or terms defined in text.
italic Italic type indicates book titles, emphasis, or placeholder variables for which you supply particular values.
monospace Monospace type indicates commands within a paragraph, URLs, code in examples, text that appears on the screen, or text that you enter.
italic monospace Italic monospace type indicates a variable in a code example that you must replace. For example:


Replace TimesTen_install_dir with the path of your TimesTen installation directory.

[ ] Square brackets indicate that an item in a command line is optional.
{ } Curly braces indicate that you must choose one of the items separated by a vertical bar ( | ) in a command line.
| A vertical bar separates alternative arguments.
. . . An ellipsis (. . .) after an argument indicates that you may use more than one argument on a single command line.
% The percent sign indicates the UNIX shell prompt.
# The number (or pound) sign indicates the prompt for the UNIX root user.

TimesTen documentation uses these variables to identify path, file and user names:

Convention Meaning
TimesTen_install_dir The path that represents the directory where the current release of TimesTen is installed.
TTinstance The instance name for your specific installation of TimesTen. Each installation of TimesTen must be identified at install time with a unique alphanumeric instance name. This name appears in the install path.
bits or bb Two digits, 32 or 64, that represent either the 32-bit or 64-bit version of the operating system.
release or rr Digits that represent the TimesTen release number, with or without dots. For example, 1121 or 11.2.1 represents TimesTen Release 11.2.1.
jdk_version One or two digits that represent the major version number of the Java Development Kit (JDK) release. For example, 5 represents JDK 5.
DSN The data source name.

Documentation Accessibility

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Accessibility of Code Examples in Documentation

Screen readers may not always correctly read the code examples in this document. The conventions for writing code require that closing braces should appear on an otherwise empty line; however, some screen readers may not always read a line of text that consists solely of a bracket or brace.

Accessibility of Links to External Web Sites in Documentation

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Access to Oracle Support

Oracle customers have access to electronic support through My Oracle Support. For information, visit or visit if you are hearing impaired.

Technical support

For information about obtaining technical support for TimesTen products, go to the following Web address: