Aio Readstream | Agent Skills Atlas

About this skill

PostgreSQL's async I/O subsystem + the read-stream API — src/backend/storage/aio/ (introduced PG 17, matured PG 18). Loads when the user asks about the readstream API, AIO methods (sync / worker / iouring), how sequential + bitmap scans issue prefetch, migrating a code path from StartReadBuffer+WaitReadBuffer to readstream, adding a new read-stream consumer, tuning iomaxconcurrency / ioworkers / iomethod, or debugging AIO-related buildfarm failures. Also for the read-stream callbacks (per-block-lookup / per-buffer-release), completion callbacks (aiocallback.c), and the iouring linkage. Skip when the ask is about client-side async (libpq) or about the WAL writer / walreceiver (those have their own I/O paths).

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This is an imported listing. We haven’t certified its safety, license, or compatibility. Skills may include executable scripts.

Automated security scan: Partial

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: f11954fd8ba696485552bdecec2784f46eccae859ce15c84ad33eed4cae5f43f

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Original listing metadata

Original name

aio-readstream

Original description

PostgreSQL's async I/O subsystem + the read-stream API — `src/backend/storage/aio/` (introduced PG 17, matured PG 18). Loads when the user asks about the read_stream API, AIO methods (sync / worker / io_uring), how sequential + bitmap scans issue prefetch, migrating a code path from `StartReadBuffer`+`WaitReadBuffer` to `read_stream_*`, adding a new read-stream consumer, tuning `io_max_concurrency` / `io_workers` / `io_method`, or debugging AIO-related buildfarm failures. Also for the read-stream callbacks (per-block-lookup / per-buffer-release), completion callbacks (`aio_callback.c`), and the io_uring linkage. Skip when the ask is about client-side async (libpq) or about the WAL writer / walreceiver (those have their own I/O paths).

About this listing

Category: Content & writing
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.