Historical performance Data not showing

Hello, friend!

Because I do not know the U2000 version, the reasons why historical performance data is invisible are as follows:

If the attributes of NE resources change, you need to perform synchronize to keep the data of the NE and performance management module the same and then perform the query. Otherwise, the collection of performance data is abnormal. 

The procedure of synchronizing information is as follows:

On the Main Topology tab, select an NE from the Physical Root navigation tree, right-click, and then choose Synchronize NE Data.

For information on how to synchronize monitoring resources of an instance in the performance module, see Synchronizing Resources of an Instance.

Thanks!