Fortigate memory management

[XavierMP]

Hi, I have a Fortigate version 5.2.13 and from time to time the memory raise to 65 / 70 % and remains there. I need to reboot the Firewall in order to comeback to a more normal memory of 30%. It seems that when the memory goes up, then it is not able to free the memory correctly. 

I'm planning to upgrade to a newer version. Any recomendation? 5.4 vs 5.6?

Thanks

[mahesh_secure]

Hi

which model ?

number of users ?

Regards

Mahesh

[XavierMP]

FG300D

Users? what do you mean by users?

People surfing internet: 100;

sessions: 3000

thanks

[mahesh_secure]

Hi

run the below command

diagnose sys top-summary

you will get some details about which process taking the memory.

Regards'

Mahesh