Chapter 1 What’s New for FortiOS 5.0 : New features in FortiOS 5.0 Patch 6 : Extended IPS Database for D-series Desktop Models
  
Extended IPS Database for D-series Desktop Models
The extended IPS database has been added for FortiGate D-series Desktop models. The extended database is disabled by default, but can be enabled in the CLI.
Syntax
config ips global
set database extended
end
 
Enabling the extended IPS database may affect the performance of a FortiGate unit.