I am trying to use the mysqli db extension with my Observium installation and when I add $config['db_extension'] = "mysqli"; to my config.php and run a discovery on a device I receive the following database errors:

Module [ ucd-diskio ] time: 0.0758s
Wifi:  RUCKUS-RADIO-MIB UU RUCKUS-WLAN-MIB Failed INSERT into DB, rollback transaction.
+UUUUUUUUUUUUUUUUUFailed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+UUUUUUUUFailed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+Failed INSERT into DB, rollback transaction.
+

Module [ wifi ] time: 0.3944s


When I remove the mysqli db extension from my config.php and run the same discovery it runs without issue:

Module [ ucd-diskio ] time: 0.0753s
Wifi:  RUCKUS-RADIO-MIB UU RUCKUS-WLAN-MIB +UUUUUUUUUUUUUUUUU+++++++++++UUUUUUUU+++++


The version information from my Observium installation is:

Observium        0.15.6.6458
OS                Linux 2.6.32-358.el6.x86_64 [amd64] (CentOS 6.4)
Apache                2.2.15 (CentOS)
PHP                5.3.3
Python                Python 2.6.6
MySQL                5.1.66 (extension: mysqli 5.1.66)
SNMP                NET-SNMP 5.5
RRDtool        1.3.8

I also added the following line to my php.ini:

extension=/usr/lib64/php/modules/mysqli.so

This points to the file:

-rwxr-xr-x 1 root root 136032 Feb 21  2013 /usr/lib64/php/modules/mysqli.so


Is there anything else that needs to be configured in order to start using the mysqli db extension with Observium?

Thank you.

--Vincent