temporary files directory

Temporary files are used on both the Pega 7 Platform server and workstations.

Server temporary files

On each server node of a system, temporary files including Java code and compiled Java classes are created in a directory that you identify during installation.

This directory is defined by the explicitTempDir entry in the prconfig.xml file or Dynamic System Settings:

where D:\zzzzz identifies an existing directory. (In some cases, the directory may be specified through JNDI rather than explicitly. The system does not create the directory if it is not found.)

As an alternative to the prconfig.xml file, you can use Dynamic System Settings to configure your application.
See How to create or update a prconfig setting.

If this prconfig entry is not present, temporary files are placed in the working directory of the application server, for example /work/Catalina/localhost/prweb for Tomcat.

This directory is parent to other directories:

LLC — Contains the lookup list cache
PRGenBackup — Backup copies of older versions of the generated files in PRGenJava and PRGenClasses
PRGenJava — Java source code, generated by rules assembly
PRGenClasses — Compiled Java, from source code generated by rules assembly
StaticContent — Extracted images (JPG, GIF, PNG), JavaScript files (JS) in subdirectories corresponding to user RuleSet lists
StaticContent/global/ServiceExport — Used by the archive tools for ZIP files, also contains files generated from the Deployment tab of a service package data instance.
SystemManagement/SystemManagementInformation — Contains ZIP files named SMA_INFO_date.zip created on request by the System Management application.

For example, if the directory is D:/Temp, the ServiceExport directory is:

D:/Temp/StaticContent/global/ServiceExport

In addition to the above, the temporary files directory on many systems also contains index files that support the full-text search facility, within three subdirectories (WorkIndex, RuleIndex, and DataIndex) of a directory named Index. The directory used for full-text indexes is determined by a Dynamic System Setting named indexing/explicitindexdir.

Notes

This directory is needed for as long as the system is installed. While some files within the directory are temporary, the directory itself is needed indefinitely.
Each system must have a dedicated, distinct temporary directory.
Microsoft Windows 2000/XP/2003 Server systems have a limit of 255 characters in the file name. Because the directory names for generated temporary files may become deep, keep the value of the explicitTempDir directory as short as practical.
Although not needed in ordinary system operation, you can delete (re-initialize to empty) the static content directories using the System Management application. Alternatively, deleting the extract marker file on a node causes the system to clear this directory (and others) during the next system startup.
In a local area network, the temporary files directory can be on any disk, but each node in a multinode clustered system must have a distinct, dedicated temporary files directory.
Beginning with V5.5, most files in the ServiceExport directory are deleted promptly after the associated upload, download, or other processing operation on the file completes, for space and security reasons.

Internet Explorer temporary files

The workstation cache for the Internet Explorer holds Web pages, images, CSS files, and JavaScript files. Select Tools > Internet Options > General > Temporary Internet Files from the Internet Explorer to set the directory that contains this cache.

Correspondence temporary files

Correspondence processing using Microsoft Word requires disk space for temporary files on the user workstation. These temporary files are created in the directory identified by the Windows TEMP environment variable, or in C:/PegaTemp if the TEMP variable is not found or identifies a device other than C:

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