Keeping systemd-journald Predictable on Small Root Volumes
Practical journald size caps, retention windows, and verification commands for hosts with 10 GB root partitions.
Engineering notes on Linux systems, storage, and networking.
Short field write-ups, reproducible CLI checks, and performance observations from running compact Debian servers.
Understanding SQLite WAL Checkpoints Under Steady Writes
Why WAL files occasionally grow past expected limits under concurrent readers and how passive vs. truncate checkpoints behave.
Notes on TLS 1.3 Key Shares, ALPN, and Session Tickets
A concise look at 1-RTT TLS 1.3 negotiation, HTTP/2 ALPN selection, and common Nginx / HAProxy gotchas.
Observing TCP Pacing and Socket Buffers on Low-Memory VMs
Measuring real congestion control, queuing disciplines, and memory trade-offs before tuning sysctl values.