Single log line is 49KB+ (ext4) / 110KB+ (btrfs) of systemd-journald disk writes
A critical performance issue in systemd-journald causes excessive disk I/O, with single log entries consuming 49KB+ on ext4 and 110KB+ on btrfs filesystems, resulting in ~50 IOPS for just 2 log lines per second and significantly increasing storage overhead. This inefficiency directly impacts VM and server performance, particularly in high-logging environments, while also raising concerns about data resilience and journal file corruption. IT organizations relying on journald for logging across their infrastructure face increased infrastructure costs, reduced system performance, and potential operational issues that demand immediate evaluation and mitigation strategies.
Hacker News3 min read