ST06n Previous hrs Memory,CPU

Hello,

In our PRD landscape it is having 4 application servers.

When monitoring from st06n in 2 application servers, we are able to view the previous hours memory and CPU information.

(last 24 hrs)

ST06n -> Systems -> ApplicationServer1 -> then under (Previous hours)

But in 2 application servers it is not visible.

What would be the reason for this matter. (Not showing previous hours info in only 2 servers. - CPU,Memory,Swap Size...etc)

and another thing is ...

In all 4 servers it is not showing the history.

Pl let me know your suggestions

Thanks and Regards,

Zerandib