Configure LQE properties

You can configure LQE to enhance performance, create backups, alter TRS vocabularies, and enable debugging function through the administration console found here: https://[server]:[port]/lqe/web/admin

Query Service

Use the Query Service page to set the properties for all queries run against LQE's data. These settings are helpful in preventing users from creating queries which would place excessive demands on the LQE server.

Screen capture of the query settings panel.

Query service enabled
Enabled by default. It may improve performance to turn off queries while LQE is performing intensive work, such as when creating an index for a new data source or writing a backup.
Query result set limit
This sets the number of results returned to the user for any query. Keeping this number low reduces the performance impact when users accidentally create queries which return an excessive number of results.
Query timeout
The amount of time in seconds during which LQE dedicate to retrieving and serving query results.
Ignore all access controls
If this option is selected LQE will display all query results to a user, not only those artifacts in products and projects to which they have access. The displayed content will be read-only.

Backup

You can create a backup of LQE's indexed data, allowing you to restore to a previous state.
Note: The server on which you are creating the backup must be mapped or mounted - URIs are not supported.
  • To create a backup immediately, click Backup Now and select your backup directory.
  • To create backups on a regular schedule, click Edit and select the time and days of the week when you want the backup created, and select your backup directory.
Screen capture of the Backup wizard showing available time intervals for creating backups.
For more information on backing up and restoring LQE, refer to: Backup and restore LQE

Notifications

Use the Notifications panel to alert users to certain events within LQE. Click the Add Recipient icon to add a user registered with JTS, and select the events for which to notify them.
Note: Since this uses the JTS email notification system it must be enabled. The email address to which the notification will be sent is that registered with JTS.
Screen capture of the Notifications page

Vocabularies

The RDF vocabularies descriptions of the schema which are used to build SPARQL queries. In this panel you can add a vocabulary, view the elements of the vocabulary, or update the vocabulary namespace, name or prefix. You cannot modify the actual vocabulary.

Screen capture of the Vocabularies panel with the Update Vocabulary wizard running.

Advanced Properties

HTTP Request Connection Timeout
Sets the time-out value in seconds for the connection between LQE and the data source. The default is 60.
HTTP Request Socket Timeout
Sets the time-out value in seconds between the establishment of a connection between LQE and the data source, and the receipt of any data from that source. The default is 60.
Reload Log Properties
The log4j.properties file contains a number of logging functions used for debugging which are disabled by default. You can edit this properties file to enable these functions and reload the file to begin logging.

Screen capture of the Advanced Properties panel.

The Show Internal function displays a more comprehensive list of properties. Due to the possibility of LQE encountering problems if these are modified, these settings should only be modified with the assistance of IBM® Support.

Screen capture showing the available advanced properties.


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