A remote connection across a Wide Area Network (WAN) between an IVG and the PostgreSQL database is not recommended. If a WAN is used, a latency of 20 ms or greater can lead to a voice platform initialization timeout resulting in an endless loop during IVG startup.

To identify latency between the request and response from the database:

• Open a Linux shell script.
• Log in as the holly user on the remote IVG instance.
• Use the following command to access PostgreSQL:

psql

• Use the following command to verify if the timing is ON or OFF:

\timing

• The response should read Timing is on.

• Use the following command:

select * from CONFIG_VALUES where name='dbrefreshtime' and domain='hlm';

• The response includes a time figure from a local database (ex Time: 2.536 ms)

The Time: value returned should be < 20 ms in order for startup to function reliably.