Clear Memory without rebooting in Sophos XG

Why do you want to "clear RAM"? Is it affecting the performance of your appliance? Just because memory is "used" in a UNIX system does not mean that it's currently being used by a process, and that process will have to allocate more if it needs more. There's a difference between what UNIX has allocated to a process and how much of that RAM a process has actually used.

Out XGS 87 routinely runs at 75% RAM utilized with no problems.

Yes, It affects performance. Memory goes high from time to time. After going high memory. It will NOT go down again. Then, Users can't use it. Then will have to reboot it. How to get to know the root cause? What's going on inside? is  there a DOS attack? 

Yes, It affects performance. Memory goes high from time to time. After going high memory. It will NOT go down again. Then, Users can't use it. Then will have to reboot it. How to get to know the root cause? What's going on inside? is  there a DOS attack? 

OK. It's not unexpected that memory might go up and not back down. But if users experience issues, that's definitely a problem.

When you say "users can't use it" what do you mean? Traffic does not flow through it? Users cannot login to it? Traffic becomes slow? The detailed symptoms will help folks diagnose.

Thanks for your quick response, 

When you say "users can't use it" what do you mean? 

e-g - Users are promoted to enter username and password, when they use O365 portal. They enter, but can't login.  

Another example, Users can't do regular internet access. After rebooting, All will become normal.