envoyproxy/gateway

Document overload manager configuration

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#8,749 opened on Apr 14, 2026

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documentationhelp wanted

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Description

I am realizing that I depend on an undocumented behavior. The overload manager triggers when memory usage reaches 80% and stops accepting requests:

https://github.com/envoyproxy/gateway/blob/8e813bdd05ecbccf0650c15f9b309b4ca49384e0/internal/infrastructure/kubernetes/proxy/resource.go#L477

https://github.com/envoyproxy/gateway/blob/8e813bdd05ecbccf0650c15f9b309b4ca49384e0/internal/xds/bootstrap/bootstrap.yaml.tpl#L322-L345

I have configured the HorizontalPodAutoscaler threshold to a lower value, so I would consider any change that lower the overload manager threshold below it, a breaking change.

Maybe a new "Overload Manager" page under Traffic? Although it is not really a "task" since it is not configurable at the moment (#3604)

Contributor guide

Research direction
Review the referenced code for overload manager configuration and threshold logic, then propose documentation under Traffic tasks. Also check issue #3604 for potential future changes.
Tech stack
go
Domain
backendinfrastructure
Issue type
Documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
GoKubernetes
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75