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Vacuum Autovacuum

Category: Engineering  ·  Sub-category: databases  ·  Last updated:
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PostgreSQL's VACUUM machinery — heap scanning, dead-tuple collection, index cleanup, HOT pruning, freezing, VM/FSM updates, truncation — plus the autovacuum launcher/worker architecture. Loads when the user asks about `VACUUM` internals, `vacuumlazy.c`'s three-phase orchestration, TidStore (the radix-tree dead-TID collector), HOT chains, HEAP_XMIN_FROZEN and freeze planning, VACUUM FREEZE, VACUUM FULL vs `vacuum_full_freeze_min_age`, autovacuum threshold + cost-limit tuning, autovacuum worker scheduling, or debugging "why is my table getting vacuumed constantly / never". Also for the xmin horizon (RecentXmin / OldestXmin / GlobalVis), the interaction between vacuum and replication slots, parallel VACUUM (`vacuumparallel.c`), and the wraparound-emergency path. Skip when the ask is about `pg_repack` (contrib alternative), pg_amcheck (verifier), or `CREATE INDEX CONCURRENTLY` (index-build side, not vacuum-side).
Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

VACUUM is PostgreSQL's storage reclaimer. It reads live-and-dead tuples off pages, prunes HOT chains, collects dead item IDs, invokes each index's bulk-delete callback, revisits heap pages to mark item IDs unused, updates the FSM/VM, freezes old tuples, and optionally truncates trailing empty pages. Autovacuum is the launcher+worker daemon that decides which relations to vacuum and when, based on cumulative-stats thresholds.

What this skill does

Vacuum Autovacuum is a community-contributed Claude Code skill in the databases sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/vacuum-autovacuum/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Vacuum Autovacuum Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 147,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/vacuum-autovacuum
curl -L https://claudskills.com/skills/vacuum-autovacuum/SKILL.md \
  -o ~/.claude/skills/vacuum-autovacuum/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/vacuum-autovacuum/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/vacuum-autovacuum/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\vacuum-autovacuum\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Vacuum Autovacuum Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/vacuum-autovacuum/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Vacuum Autovacuum skill do?
PostgreSQL's VACUUM machinery — heap scanning, dead-tuple collection, index cleanup, HOT pruning, freezing, VM/FSM updates, truncation — plus the autovacuum launcher/worker architecture. Loads when the user asks about `VACUUM` internals, `vacuumlazy.c`'s three-phase orchestration, TidStore (the radix-tree dead-TID collector), HOT chains, HEAP_XMIN_FROZEN and freeze planning, VACUUM FREEZE, VACUUM FULL vs `vacuum_full_freeze_min_age`, autovacuum threshold + cost-limit tuning, autovacuum worker scheduling, or debugging "why is my table getting vacuumed constantly / never". Also for the xmin horizon (RecentXmin / OldestXmin / GlobalVis), the interaction between vacuum and replication slots, parallel VACUUM (`vacuumparallel.c`), and the wraparound-emergency path. Skip when the ask is about `pg_repack` (contrib alternative), pg_amcheck (verifier), or `CREATE INDEX CONCURRENTLY` (index-build side, not vacuum-side).
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Vacuum Autovacuum skill?
Use Vacuum Autovacuum when your Claude Code task falls under the Engineering category — specifically in the databases area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Vacuum Autovacuum" or describe the task and let Claude pick). Browse related skills at /category/engineering/.
What is a Claude Code skill and how does the Vacuum Autovacuum skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Vacuum Autovacuum is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
matejformanek. (2026). Vacuum Autovacuum [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/vacuum-autovacuum/
BibTeX
@misc{vacuum-autovacuum-2026,
  author    = {matejformanek},
  title     = {Vacuum Autovacuum [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/vacuum-autovacuum/}
}

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Security scan

Grade A · scanned 2026-07-10 — free static scan against the OWASP Agentic Skills Top 10.

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