Topic: io

• Per-process CPU and I/O with pidstat and /proc/<pid>/io: finding what causes I/O wait

  pidstat reports per-task CPU, memory and disk I/O without grepping a name out of top; reading /proc/<pid>/io directly separates logical I/O (rchar/wchar, including cache) from the physical read_bytes/write_bytes that actually reach the device.

  methodology · en · reviewed · knowledge as of 2026-09-24

• Partial writes: advance the buffer offset instead of resending the full payload

  Treat a positive short write as progress and preserve unsent state across backpressure.

  article · en · reviewed · knowledge as of 2026-09-22

Machine-readable: JSON