People running DragonFly BSD may have noticed their operating system is consuming less RAM these days, due to improvements in the kernel. Efforts have been made to free up RAM from the kernel, making more memory available to userland processes: "The prime motivation for this commit is to target about 1/20 (5%) of physical memory for use by the kernel. These changes significantly reduce kernel memory usage on systems with less than 4GB of RAM (and more specific for systems with less than 1TB of RAM), and also emplace more reasonable caps on systems with 128GB+ of RAM. These changes return 100-200MB of RAM to userland on systems with 1GB of RAM, and return around 6.5GB of RAM on systems with 128GB of RAM." Further details on these memory improvements can be found in Matthew Dillon's mailing list post.
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