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Article0 replies2,034 followingPosted 20 Apr 2026, 09:45 UTC18.2K views4,523 votes

Diagnosing Pacman ParallelDownloads Failures on Arch Linux

Repeated 'failed retrieving file' warnings during pacman -Syu often trace to ParallelDownloads set too high for your mirror. This guide shows how to diagnose and tune it.

Community & Careers · Guide

arch-linux

archlinux pacman

Tasadduq Burneyowner

Started20 Apr 2026, 09:45 UTC

Level 38Owner34,775 rep points

Community & Careers

Article0 replies1,362 followingPosted 15 Feb 2026, 17:39 UTC26.7K views4,801 votes

Speeding Up Arch Linux Updates with Pacman's Parallel Downloads

Learn how to enable Pacman's ParallelDownloads option to download multiple Arch Linux packages at once, verify the concurrent workers, and understand the bandwidth and mirror trade‑offs.

Community & Careers · Blog

arch-linux

archlinux pacman

Community & Careers

Question1 answer2,263 followingPosted 17 May 2026, 19:53 UTC108.8K views1,356 votes

owner answered

ParallelDownloads in pacman 6.0: Picking a Per-Mirror Concurrency Limit

pacman 6.0 introduced the ParallelDownloads option in /etc/pacman.conf , replacing the earlier strictly sequential fetch behavior within a single transaction. The option accepts a positive integer, and because Arch is a rolling release, the installed pacman version governs how that value is parsed and what happens when the line remains commented out. Upgrade

Community & Careers · Editorial question

arch-linux

archlinux pacman-conf