![]() ![]() SysMain is part of the Service Host bundle of services. In short, SysMain analyzes your application usage patterns and optimizes program launching. So a 2GB package can be compressed into a 1GB package. So, after Windows 10 version 1809, when the system needed more memory than was available, instead of sending data to the paging file on the hard disk, it compressed the data. In the Windows 10 update 1809, Microsoft replaced the Superfetch service with SysMain. Page file memory was first introduced in Windows Vista under the name Superfetch. When there’s not enough RAM, programs that need it may access virtual memory found on the hard disk. Virtual memory space is reserved on the hard disk, which allows loading memory and storing information. ![]() In addition to RAM, Windows also has a paging file (virtual memory). This article will help you address this issue by providing you with ways to fix SysMain high disk usage. Many people have noticed that SysMain uses way more disk resources than it normally should, making their computers run considerably slower. But this service was replaced with a service called SysMain, which is the same service but with a new name. Previously, many Windows 10 users had issues with the Superfetch service causing high disk usage. Service Host SysMain causing 100% disk usage? Find out how to fix that ![]()
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