2 Oracle Application Express Installation Requirements

This chapter describes the requirements for installing Oracle Application Express.

2.1 Oracle Database Requirements

Oracle Application Express release 4.2 requires an Oracle database (Enterprise Edition, Standard Edition or Standard Edition One) that is Release and later. Oracle Application Express release 4.2 can also be used with Oracle Database Express Edition 10g Release 2 (10.2) and later. The Oracle HTTP Server is not included with the distribution of Oracle Database Express Edition.


You can upgrade the version of Oracle Application Express in Oracle Database Express Edition 10g Release 2 (10.2) and later, by installing Oracle Application Express release 4.2. For more information, see the Oracle Application Express Learn More page on the Oracle Technology Network (OTN).

2.1.1 Checking the shared_pool_size of the Target Database


Ignore this requirement if your configuration defines specific memory target values for the database initialization parameters SGA_TARGET (in Oracle Database 10g and 11g or later) MEMORY_TARGET (in Oracle Database 11g or later).

Oracle Application Express requires the shared_pool_size of the target database to be at least 100 MB.

To check the shared_pool_size of the target database:

  1. Start the database:

  2. If necessary, enter the following command to determine whether the system uses an initialization parameter file (initsid.ora) or a server parameter file (spfiledbname.ora):


    This command displays the name and location of the server parameter file or the initialization parameter file.

  3. Determine the current values of the shared_pool_size parameter:

  4. If the system is using a server parameter file, set the value of the SHARED_POOL_SIZE initialization parameter to at least 100 MB:

  5. If the system uses an initialization parameter file, change the value of the SHARED_POOL_SIZE parameter to at least 100 MB in the initialization parameter file (initsid.ora).

  6. Shut down the database:

  7. Restart the database:


2.2 Browser Requirements

To run or develop Oracle Application Express applications, Web browsers must have JavaScript enabled. The following browsers are required to develop applications in Oracle Application Express:

  • Microsoft Internet Explorer 7.0 or later

  • Mozilla Firefox 14 or later

  • Google Chrome 21 or later

  • Apple Safari 5.0 or later

Oracle Application Express applications can be developed that support earlier Web browser releases, including Microsoft Explorer 6.0. Application Express has a number of advanced widgets, such as date pickers, which may not work correctly on earlier browsers.

2.3 Web Listener Requirements

In order to run Oracle Application Express you must have access to one of the following:

  • Oracle REST Data Services

    Oracle REST Data Services is a Java-based Web server. It features file system caching, offers improved file upload capability, and is certified with Oracle WebLogic Server, and Oracle Glassfish Server.

  • Embedded PL/SQL gateway

    Oracle XML DB Protocol Server with the embedded PL/SQL gateway installs with Oracle Database 11g Release 1 (11.1). It provides the database with a Web server and the necessary infrastructure to create dynamic applications.

  • Oracle HTTP Server and mod_plsql

    Oracle HTTP Server uses the mod_plsql plug-in to communicate with the Oracle Application Express engine within the Oracle database.

The following products include appropriate versions of HTTP Server and mod_plsql:

  • Oracle Database 10g Companion CD Release 2

  • Oracle Database 11g Release 1 (11.1) and Oracle Database 11g Release 1 (11.2)

  • Oracle Database 12c Release 1 (12.1)

2.4 Disk Space Requirement

Oracle Application Express disk space requirements are as follows:

  • Free space for Oracle Application Express software files on the file system: 278 MB if using English only download (apex_4.2_en.zip) and 935 MB if using full download (apex_4.2.zip).

  • Free space in Oracle Application Express tablespace: 275 MB

  • Free space in SYSTEM tablespace: 100 MB

  • Free space in Oracle Application Express tablespace for each additional language (other than English) installed: 60 MB

2.5 Oracle XML DB Requirement

Oracle XML DB must be installed in the Oracle database that you want to use. If you are using a preconfigured database created either during an installation or by Database Configuration Assistant (DBCA), Oracle XML DB is already installed and configured.

See Also:

Oracle XML DB Developer's Guide for more information about manually adding Oracle XML DB to an existing database


The installer does a prerequisite check for Oracle XML DB and will exit if it is not installed.


The installation of Oracle XML DB creates the user ANONYMOUS. In order for Oracle Application Express workspace provisioning to work properly, the ANONYMOUS user must not be dropped from the database.

2.6 PL/SQL Web Toolkit

Oracle Application Express requires the PL/SQL Web Toolkit release or later. For instructions on determining the current release of the PL/SQL Web Toolkit, and for instructions on installing release, please review the README.txt file contained in the directory apex/owa.