Open Source Document Management System | OpenKM

Hey there,
Recently i have been imported a lots of files(about 10000) into openkm and now it is too slow on loading folders,for example when i click on a folder it takes about 10-15 seconds loading the folder and show its documents.during this time the following gift shows on screen :
This is a snapshot of the statistics tab :
(Im using openkm 6.3.7 community edition )

please also note to this point that i used some metadata values for each document and import the data to openkm by execute thousand lines of queries.
I am suspected of metadatas to slow down the system

Try deleting all the records from tables:
OKM_DASHBOARD
OKM_DASHBOARD_ACTIVITY