On Fri, 2022-01-28 at 17:31 +0100, Marco Möller wrote: > On 28.01.22 11:15, Steven J. West wrote: > > Comparing the Ubuntu and Debian kernel parameters using sudo sysctl > > -a > > showed two key differences in virtual memory (vm) management > > parameters. > > > > * Ubuntu: > > o vm.swappiness=60 > > o vm.watermark_boost_factor=0 > > * Debian: > > o vm.swappiness=10 > > o vm.watermark_boost_factor=150 > > Might this "150" be a typographical error and you wanted to write > 150000? > Your reference to the Red Hat documentation states 150000 to be the > default in Red Hat, and in my Debian, where I have not touched this > value, it is also set to 150000.
Might 150000 be a typographical error too? ;-) On my machine... # cat /proc/sys/vm/watermark_boost_factor 15000 Which matches the default in the kernel source code [1] and 'git blame' shows that line hasn't been changed since the original commit in 2018 [2] [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/mm/page_alloc.c?id=169387e2aa291a4e3cb856053730fe99d6cec06f#n354 [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1c30844d2dfe272d58c8fc000960b835d13aa2ac -- Tixy
