# Measured 2026-08-08: 490.7M of journal spans 3.67d = ~134 MB/day, so the previous # 500M cap held 3.7d. 5G holds ~37d, which makes MaxRetentionSec the binding limit # rather than the cap. SystemKeepFree is the disk-fill guard: / is 91% full, so # journald's 15%-of-filesystem default would evict everything on sight. [Journal] Storage=persistent SystemMaxUse=5G SystemKeepFree=2G SystemMaxFileSize=50M MaxFileSec=1day MaxRetentionSec=30day