FortiGate scheduled updates

[Akira]

I'm currently investigating FortiGate scheduled updates.

What I would like to know is what is the difference between the content of this scheduled update and the regular update.
I would appreciate it if you could tell me specifically.
And what is the impact of this scheduled update running every hour?

The following sentence is a FortiGate log.
①logid=0100041000 type=event subtype=system level=notice vd=root logdesc="FortiGate updated" status=update msg=" Fortigate scheduled update fcni=yes fdni=yes fsci=yes from...
②logid=0100041000 type=event subtype=system level=notice vd=root logdesc="FortiGate updated" status=update msg=" Fortigate scheduled update fcni=yes fdni=yes fsci=yes virdb(84.00398) etdb(84.00398) mmdb(84.00398) dnsbot(2.00697) idsdb(17.00024) idsetdb(0.00000) idsurldb(0.00000) from...

Please help me！