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Comment by ajb | Hacker News Reader

journald also logs to /run/log/journal/ (a tmpfs) so until reboot you can still extract logs from it even if it didn't manage to write them to disk. See the 'storage' option in `man journald.conf`

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One can use:

journalctl --relinquish-var

to switch from /var/log/journal/ to /run/log/journal/ (which should be a tmpfs)

That part of the man page sounds confusing. Is it unconditional and enabled by default?

You have also

     RuntimeMaxUse=, RuntimeKeepFree=, RuntimeMaxFileSize=, RuntimeMaxFiles=

options if you are concerned about journald overusing tmpfs. But yes, it seems unconditional that it writes the logs always somewhere, which is not unreasonable design imho.

Yes - unconditional by default, to be clear. I think if you set storage to 'none' it will switch it off completely

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