Claude Code
Codex
Cursor
GitHub Copilot
Gemini CLIAbout this skill
PostgreSQL's MultiXact machinery — src/backend/access/transam/multixact.c — the multi-transaction ID system that lets a single heap tuple record multiple concurrent lockers (for SELECT ... FOR SHARE and SELECT ... FOR UPDATE blends) plus the multixact-freeze / wraparound path. Loads when the user asks about MultiXactId semantics, xmax interpretation with the HEAPXMAXISMULTI bit, why a tuple can appear to be locked by multiple transactions, tuple-locking modes (FOR SHARE / FOR NO KEY UPDATE / FOR KEY SHARE), the multixact SLRU (pgmultixact/), MultiXact member offsets, or the autovacuummultixactfreezemaxage wraparound path. Skip when the ask is about clog (regular transaction commit status — sibling but different code) or 2PC prepared transactions.
Quick start
- Copy the install prompt. Use the green button above this README.
- Send it to your agent. Paste it into your coding agent’s chat and send.
- Review the setup. Your agent checks the skill’s instructions, requirements, and installation scope.
Review, license & listing details
This is an imported listing. We haven’t certified its safety, license, or compatibility. Skills may include executable scripts.
Only SKILL.md was scanned. Supporting files and scripts were not checked. No safety grade has been assigned.
0 potential findings · Scanned 11/4/2026 · Scanner 0.2.1
Content SHA-256: 7c42748a2c9024039b86f6f4a682c373dad7e75d8414c2aac153e4d00c7c3a3a
About this listing
- Category
- Engineering
- Reported license
- PostgreSQL
- Listing language (estimated)
- English
- Review status
- Not individually reviewed
- Agent compatibility
- Atlas installation supports Claude Code, Codex, and Cursor. Skill-specific dependencies and features are checked during setup.