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Single systemd-journald log line triggers up to 110KB of disk writes

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A bug report filed on the systemd GitHub repository reveals that writing a single log line via systemd-journald results in disproportionately large disk write amplification. On ext4 filesystems, one log entry generates over 49KB of actual disk writes, while on btrfs the figure exceeds 110KB. The issue highlights a significant write amplification problem within journald's logging mechanism. This inefficiency could have meaningful implications for storage performance, SSD lifespan, and systems that log at high frequency.

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Single systemd-journald log line triggers up to 110KB of disk writes · ShortSingh