How to Fix Service Host SysMain High Disk Usage Other reasons for high resource usage include running an application with faulty backend code, as addressed by Microsoft, or attempting to preload very large files (AAA game files, for instance). In some cases, the PC basically becomes unusable for the first 10-15 minutes after booting because it attempts to load too many programs at once. When analyzing program usage patterns, SysMain will sometimes overdo it and overtax the HDD. Why is SysMain Using So Much Disk CPU Memory At least, when it’s working as intended anyway. To sum it up, Service Host SysMain preloads frequently used programs into cached memory without affecting system performance. As this memory is marked at low priority, if the memory is required for something else, it will be given up. You may be worried that background programs are occupying the memory and affecting system performance. Standby Memory contains cached data that isn’t actively in use. Using this info, it preloads the applications into the Standby Memory.
Over time, SysMain not only learns what programs you run most often but also the timing and order. The way it does this is by analyzing application usage patterns and timing.įor instance, let’s say you power up your laptop in the morning and usually launch Chrome, Outlook, Spotify, and Discord. What is Service Host SysMain (Superfetch)Īs stated, SysMain is a Windows feature that attempts to reduce load times.
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