How-To

Tune Postgres per-table autovacuum settings and track them with a single SQL view. Covers global defaults, table-specific overrides, and a ready-to-use monitoring query.

A deep dive into how the Linux kernel receives network packets, covering the full path from NIC hardware through NAPI, softirqs, GRO, RPS, and protocol layers. Includes practical monitoring commands and tuning knobs for each stage.

A collection of useful Wireshark display filters for analyzing SSL/TLS handshake traffic, including a reference table of handshake message types and notes on cipher suite considerations.

A practical guide to using the netshoot container for Docker and Kubernetes network troubleshooting. Covers network namespaces, tcpdump examples, and real-world diagnostic workflows.

A practical guide to tuning Postgres memory parameters including shared_buffers, work_mem, and maintenance_work_mem. Learn how to measure actual usage, avoid out-of-memory crashes, and balance allocations for optimal performance.

A practical guide to resolving PostgreSQL pg_wal disk-full issues, covering both reactive recovery steps and proactive measures to prevent recurrence. Learn how to free space, move the WAL directory, and configure archiving correctly.