dist: sysctl: increase vm.vfs_cache_pressure #14509
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Our usage of inodes is dual: - the Index.db and Data.db components are pinned in memory as the files are open - all other components are read once and never looked at again As such, tune the kernel to prefer evicting dcache/inodes to memory pages. The default is 100, so the value of 2000 increases it by a factor of 20. Ref scylladb#14506
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CI state |
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@xemul please review |
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I assume we should backport it? |
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No, we avoid backporting non-regression-fixes. In any case this has the potential to reduce stability and should get considerable soak time. |
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@avikivity this got some soak time. Will we backport this? |
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Our usage of inodes is dual:
As such, tune the kernel to prefer evicting dcache/inodes to memory pages. The default is 100, so the value of 2000 increases it by a factor of 20.
Ref #14506