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.
- 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.
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.
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.
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.

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.