System journal size

[MakeTopSite]

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systemctl status systemd-journald
● systemd-journald.service - Journal Service
   Loaded: loaded (/lib/systemd/system/systemd-journald.service; static; vendor preset: enabled)
   Active: active (running) since Wed 2021-01-20 10:07:15 CET; 10min ago
     Docs: man:systemd-journald.service(8)
           man:journald.conf(5)
 Main PID: 318 (systemd-journal)
   Status: "Processing requests..."
    Tasks: 1 (limit: 4702)
   Memory: 99.0M
   CGroup: /system.slice/systemd-journald.service
           └─318 /lib/systemd/systemd-journald


Jan 20 10:07:15 h systemd-journald[318]: Journal started
Jan 20 10:07:15 h systemd-journald[318]: Runtime journal (/run/log/journal/6...) is 8.0M, max 170.3M, 162.3M free.
Jan 20 10:07:16 h systemd-journald[318]: Time spent on flushing to /var is 15.664555s for 636 entries.
Jan 20 10:07:16 h systemd-journald[318]: System journal (/var/log/journal/6...) is 2.0G, max 2.0G, 0B free.
Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.


but

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cat  /etc/systemd/journald.conf
[Journal]
Storage=persistent
#Compress=yes
#Seal=yes
#SplitMode=uid
#SyncIntervalSec=5m
#RateLimitIntervalSec=30s
#RateLimitBurst=10000
SystemMaxUse=5G
#SystemKeepFree=
SystemMaxFileSize=5G
#SystemMaxFiles=100
RuntimeMaxUse=3G
#RuntimeKeepFree=
#RuntimeMaxFileSize=
#RuntimeMaxFiles=100
#MaxRetentionSec=
#MaxFileSec=1month
#ForwardToSyslog=yes
#ForwardToKMsg=no
#ForwardToConsole=no
#ForwardToWall=yes
#TTYPath=/dev/console
#MaxLevelStore=debug
#MaxLevelSyslog=debug
#MaxLevelKMsg=notice
#MaxLevelConsole=info
#MaxLevelWall=emerg
#LineMax=48K
#ReadKMsg=yes


Should not System journal have got more free space ? (0B actually)

[Head_on_a_Stick]

Check the free space on the filesystem for the partition that contains /var and read the man page again. SystemKeepFree is probably limiting the journal space.

[MakeTopSite]

Check the free space on the filesystem for the partition that contains /var and read the man page again. SystemKeepFree is probably limiting the journal space.

Free space is 13 GB, total partition size 27 GB. I'll read man once again.

[reinob]

RTFM... -> "value is capped to 4G".

It could be that "5G" is ignored (hopefully with a warning in the log), and then a default value is used.

[Head_on_a_Stick]

"value is capped to 4G"

That's just for the default settings.

[MakeTopSite]

It could be that "5G" is ignored (hopefully with a warning in the log)

No such or similar warning in the log.

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# journalctl --disk-usage
Archived and active journals take up 2.0G in the file system.


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# du -h /var/log/journal/
2,1G   /var/log/journal/2714ae9b4deba9ba9ff
2,1G   /var/log/journal/