Hello Nita,
in your screenshot i can see, that the view loads in avg. 6 seconds if a ticket will load. Is it possible that all articles in the tickets are expanded? If the articles in ticktes general expanded, this article will load if you load a ticket.
Also i can see, that the view "AgentITSMConfigItem" is load extrem slow. Can you find some errors in the log file?
best regards, Tino Voigt