Single log line is 49KB+ (ext4) / 110KB+ (btrfs) of systemd-journald disk writes
Summary
A single log line can cause systemd-journald to write 49KB+ on ext4 and 110KB+ on btrfs due to disk write amplification, highlighting a significant performance issue in systemd's logging subsystem.
View Cached Full Text
Cached at: 08/13/26, 09:22 PM
systemd/systemd
Source: https://github.com/systemd/systemd
System and Service Manager
Details
Most documentation is available on systemd’s website.
Assorted, older, general information about systemd can be found in the systemd Wiki.
Information about build requirements is provided in the README file.
Consult our NEWS file for information about what’s new in the most recent systemd versions.
Please see the Code Map for information about this repository’s layout and content.
Please see the Hacking guide for information on how to hack on systemd and test your modifications.
Please see our Contribution Guidelines for more information about filing GitHub Issues and posting GitHub Pull Requests.
When preparing patches for systemd, please follow our Coding Style Guidelines.
If you are looking for support, please contact our mailing list, join our IRC channel #systemd on libera.chat or Matrix channel
Stable branches with backported patches are available in the stable repo.
We have a security bug bounty program sponsored by the Sovereign Tech Fund hosted on YesWeHack
Repositories with distribution packages built from git main are available on OBS, and also repositories with packages built from the latest stable release
Similar Articles
git log costs your agent 624 tokens. It needs 55. Here's a list of the worst offenders
The article highlights how verbose CLI output wastes tokens for LLM coding agents and introduces a pattern-based compressor that reduces shell command output noise while preserving essential information.
@diblacksmith: My RLM agent can effortlessly process ~80k lines of service logs from CloudWatch in a single go. that's worth like 8 mi…
A developer's RLM agent processes ~80k lines of CloudWatch logs efficiently, inferring service architecture and finding issues, with plans to open-source it soon.
You Don't Love systemd Timers Enough
This article advocates for using systemd timers over traditional cron jobs for scheduled tasks on Linux, highlighting their better integration, logging, and clearer syntax.
Systemd 261 released with systemd-sysinstall, IMDSD, and storagectl
Systemd 261 is released with significant new features including the systemd-sysinstall OS installer, IMDSD for unified cloud metadata access, and storagectl for storage management.
Show HN: ZeroFS – A log-structured filesystem for S3
ZeroFS is a log-structured filesystem that serves S3-compatible buckets as POSIX filesystems over NFS and 9P, or as raw block devices, with compression, encryption, and local caching for fast reads. It passes extensive POSIX and stress test suites, including kernel builds and Jepsen failover testing.