Subject: Arch-announce Digest, Vol 14, Issue 2

From: [email-masked]
Date: Mon, 08 Apr 2024 08:03:20 +0000

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Today's Topics:

   1. [arch-announce] Increasing the default vm.max_map_count value
      (Arch Linux: Recent news updates: Robin Candau)

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Message: 1
Date: Sun, 07 Apr 2024 18:12:44 -0000
From: "Arch Linux: Recent news updates: Robin Candau"
	<[email-masked]>
Subject: [arch-announce] Increasing the default vm.max_map_count value
To: [email-masked]
Message-ID: <[email-masked]>
Content-Type: text/plain; charset="utf-8"

The [vm.max_map_count][1] paramater will be increased from the default `65530` value to `1048576`.

This change should help address performance, crash or start-up issues for a number of memory intensive applications, particularly for (but not limited to) [some Windows games][2] played through Wine/Steam Proton. Overall, end users should have a smoother experience out of the box with no expressed concerns about potential downsides in [the related proposal on arch-dev-public mailing list][3].

This `vm.max_map_count` increase is introduced in the `2024.04.07-1` release of the [filesystem package][4] and will be effective right after the upgrade.

Before upgrading, in case you are already setting your own value for that parameter in a `sysctl.d` configuration file, either remove it (to switch to the new default value) or make sure your configuration file will be read [with a higher priority][5] than the `/usr/lib/sysctl.d/10-arch.conf` file (to supersede the new default value).

[1]: https://docs.kernel.org/admin-guide/sysctl/vm.html#max-map-count
[2]: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2057792/comments/5
[3]: https://lists.archlinux.org/archives/list/[email-masked]/thread/5GU7ZUFI25T2IRXIQ62YYERQKIPE3U6E/
[4]: https://archlinux.org/packages/core/any/filesystem/
[5]: https://man.archlinux.org/man/sysctl.8#SYSTEM_FILE_PRECEDENCE

URL: https://archlinux.org/news/increasing-the-default-vmmax_map_count-value/

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