The w3wp process is a worker process of the IIS web server which hosts an application pool. DataMiner uses it to provide our web apps. It runs a few ASP.NET applications like the WebAPI. It has its own caches where it keeps all active alarms, views, etc. If you think it takes up too many resources then please reach out to our support and provide us a memory dump file of the w3wp process, so that we can investigate it further. Or if you have a lot of users connecting through the web apps, then it's possible to host the DataMiner web apps on a separate web server (see Dashboards Gateway).