SAP Portal - Page Timeout and Session Timeout

1. Goto Portal Catalogue -> Content Provided by SAP -> End User Content -> Standard Portal users
2. Right click on 'Default Framework Page' open --> object
3. Select 'Desktop InnerPage' and edit it(drag the horizontal scroll to right side )
4. select show all in the category drop down and go down in the property page where you can see Page Timeout Set the value for "Page Timeout" and click on save in the top

Or

To the page timeout property add the following property to the property file (portalapp.xml):

com.sap.portal.page.PageTimeout=108000

The value is defined in milliseconds. The default value is 15 seconds = 15000 milliseconds. A page timeout value of -1 defines, that there is no time out and that the page will wait for all of the portal applications to finish loading as long as necessary.

If modify portalapp.xml then restart Portal, in the editor, it will show Changed by SAP.

Also, Session management is controlled by the profile parameter "rdisp/plugin_auto_logout". This parameter, with a default value of 30 minutes, controls the time that a session can be idle before it is cleared.

Said plugin_auto_logout is only for SAP GUI client, not for HTTP client.