You have now reached a stage where you have highly tuned and optimized your infrastructure. However, you might sometimes still see that logging on to Oracle Enterprise Manager Fusion Middleware Control takes a long time. This might happen when you have a large number of composite applications deployed into the infrastructure and subsequently a large number of instances for each of them. It should be a good idea to tune the page load times by enabling lazy loading and on demand instance fetching.
Simply right-click on soa-infra, navigate to SOA Administration | Common Properties, and tune the display options by checking the two checkboxes under Data Display Options as illustrated in the following screenshot. Set the duration details to a reasonable value such as 12 hours (or higher), depending on how much data you want retrieved by default.