Decrease Memory Usage

di de crashlog read 

 This command will show you the crashlog of the fortigate 

 "Kernel exits extreme low memory mode" looking for that error 

 diag autoupdate versions will show the versions of the autoupdates 

 diag autoupdate versions | grep Attempt -f this will show the times of autoupdate attempts 

 First thing we can do is disable the automatic security rating report. 

 config sys global 

 set security-rating-run-on-schedule disable 

 end 

 Next we will set the Internet Service Database to only download the in use databases 

 config sys fortiguard 

 set internet-service-database on-demand 

 end 

 follow that with 

 execute update-ffdb-on-demand