Convoy Effect
Updated 2026-08-02
INTRODUCTION
English translation pending.
CORE DEFINITION
The convoy effect describes a scheduling inefficiency in which a single long-running, resource-intensive task occupies a shared resource while many short tasks wait behind it, so average waiting time rises sharply. The name comes from the image of slow trucks forcing a queue of faster cars to travel at their pace. The effect appears in operating system scheduling, service queues, and personal task management. Key qualification: the inefficiency depends on the order of arrival, so reordering or isolating long tasks removes most of the delay.
SCAFFOLDING EFFECT
Reduce cognitive load
- Find the blocker: identify the long task that holds a shared resource. - Reorder the queue: run short tasks first or move the long one off the critical path. - Isolate heavy work: give long tasks a separate lane so they cannot block others.
Anchor fast decisions
A shared resource serves one task at a time, so the duration of the task at the front determines how long everyone behind waits. Because a long task delays many short ones simultaneously, the total waiting time grows far faster than the long task's own duration. Reordering or separating the heavy task removes the coupling that produces the delay.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
account_treeGenealogyexpand_more
menu_bookReferencesexpand_more
Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Lock_convoyverified
PRIVATE NOTES · Only visible to you
SAVED Q&A
ENTRY Q&A · Private saving available
Ask with a clear boundary
thinkingmodels answers from published entry context only.
Your question is sent to thinkingmodels. The answer uses public entry context only.
RELATED MODELS