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vm: Document dirty_bytes and dirty_background_bytes

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Pavol Žáčik 2025-07-31 11:05:40 +02:00
parent 9e88d33b11
commit 0222cbff3f
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1 changed files with 18 additions and 2 deletions
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20
tuned/plugins/plugin_vm.py
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@ -14,12 +14,28 @@ cmd = commands()
class VMPlugin(base.Plugin):
"""
Tunes selected sysctl options in `/proc/sys/vm`, currently
[option]`dirty_ratio`, [option]`dirty_background_ratio`,
[option]`dirty_bytes`, and [option]`dirty_background_bytes`.
See https://docs.kernel.org/admin-guide/sysctl/vm.html for detailed
documentation of these options.
Additionaly enables or disables transparent huge pages depending on
.Set dirty bytes to 64 MiB
====
----
[vm]
dirty_bytes=67108864
----
====
.Set dirty bytes to 10% of total available memory
====
Note that this updates the `/proc/sys/vm/dirty_ratio` sysctl option.
----
[vm]
dirty_bytes=10%
----
====
Additionally enables or disables transparent huge pages depending on
the value of the [option]`transparent_hugepages` option. The option
can have one of three possible values: `always`, `madvise` and `never`.