Web Protection - Failed to get scanner instance (already solved)

Yesterday I encountered a problem with the proxy server.
Every browser request got answered by an error notice
(see attachment : client_error.jpg), which resulted
in all users not being able to use internet services.

A little research showed me that the Memory and Swap
Usage were at a very high percentage (Mem:96.77% and
Swap:100.00%) (see attachment : monthly_stat.jpg).

Restarting the server was no option to resolve this problem
and I chose for the option of resetting (toggle off/on)
some services. I started with the Antivirus scanning
engine (see attachment : antivirus.jpg).

This immediately solved my problem and the high
memory usage of the server. A drop of 50% can be
seen in the montly_stat.jpg.

At this point the server is OK, but I have some worries
that this will be a recurring problem.

Sophos UTM 9 Server info
HP Proliant DL380 G8
RAM : 4GB
CPU : Intel Xeon Quadcore
Support : Standard Support
Version : Software

Question for all...is there any other place where I can
drop this information?

Attached Images

	client_error.JPG (27.1 KB)
	monthly_stat.jpg (40.4 KB)
	antivirus.jpg (80.0 KB)