General Dev>In The News

The Problem with CPUs and Kubernetes

CommunityNews

CommunityNews

The Problem with CPUs and Kubernetes

Key Takeaway:

os .cpus() returns the number of cores on a Kubernetes host, not the number of cores assigned to a pod.

Investigating excessive memory usage

Recently, when I was looking through a cluster health dashboard for a Kubernetes cluster, I noticed that one of the applications deployed was using a considerable amount of RAM - way more than I thought could be reasonable. Each instance (pod) of the application used approximately 8 GB of RAM, which was definitely excessive for a reasonably simple NodeJS webserver. Combined with the application running 20-30 replicas or so, it makes the total RAM usage between 160 GB and 240 GB.

Read in full here:

This thread was posted by one of our members via one of our news source trackers.

1 comment
#kubernetes
4 984 1

Most Liked

OvermindDL1

OvermindDL1

Yeah the way CPU allocation works is it a relative CPU amounts, there’s both a minimum given (could access more if unused), as well as a max, but as this can change as the hardware is hotswapped among other things it can’t just overwrite what the cpu core count shown is as it can potentially change. Should always give the allowed thread count passed into the program, don’t try to calculate it based on something.

2
Post #3

Where Next?

View thread on forum
kubernetes
Home General Dev>In The News
#kubernetes
4 984 1
Last post

Popular General Dev topics Top

First poster: HenryCost
General Dev>In The News

I wired my tree with 500 LED lights and calculated their 3D coordinates
I wired my tree with 500 LED lights and calculated their 3D coordinates… If you support me on Patreon at any point in December 2020 I wi...
youtube.com
1 1744 2
New
First poster: bot
General Dev>In The News

20 patterns to watch for in your engineering team (pdf)
A field guide to help you recognize achievement, spot A field guide to help you recognize achievement, spot bottlenecks, and debug your d...
pluralsight.com
0 1347 0
New
First poster: iPaul
General Dev>In The News

Japan government backs 4-day workweek
TOKYO (Kyodo) – Japan’s government plans to encourage firms to let their employees choose to work four days a week instead of five, aimin...
mainichi.jp
35 1889 18
New
First poster: bot
General Dev>In The News

SPWN – A programming language that compiles to Geometry Dash levels
SPWN is a programming language that compiles to Geometry Dash levels. What that means is that you can create levels by using not only the...
github.com
#programming
0 2217 0
New
First poster: AstonJ
General Dev>In The News

Wearable Microphone Jamming
We engineered a wearable microphone jammer that is capable of disabling microphones in its user’s surroundings, including hidden micropho...
sandlab.cs.uchicago.edu
/security
7 1834 3
New
First poster: bot
General Dev>In The News

Introducing the ChatGPT/LLM error tracker
Large Language Models like ChatGPT say The Darnedest Things. The Errors They MakeWhy We Need to Document Them, and What We Have Decided ...
garymarcus.substack.com
#error#chatgpt
0 3521 0
New
First poster: bot
General Dev>In The News

ONNX Runtime merges WebGPU backend
[js/web] WebGPU backend via JSEP by fs-eire · Pull Request #14579 · microsoft/onnxruntime. Description This change introduced the follo...
github.com
#backend
0 1372 0
New
First poster: joeb
General Dev>In The News

Rust has been forked to the Crab Language
GitHub - crablang/crab: A community fork of a language named after a plant fungus. All of the memory-safe features you love, now with 100...
github.com
/rust
0 1459 1
New
First poster: joeb
General Dev>In The News

JavaScript Fatigue Strikes Back
The new frameworks will continue until morale improves.
allenpike.com
/js
6 869 5
New
First poster: alvinkatojr
General Dev>In The News

Yoke is really cool
Infrastructure as code, but actually
xeiaso.net
2 707 1
New

Other popular topics Top

PragmaticBookshelf
General Dev>Learning Resources

A Common-Sense Guide to Data Structures and Algorithms, Second Edition
Algorithms and data structures are much more than abstract concepts. Mastering them enables you to write code that runs faster and more e...
pragprog.com
#pragprog/python/ruby#published-book/book-a-common-sense-guide-to-data-structures-and-algorithms-second-edition#math#algorithms/js
19 6022 5
New
siddhant3030
General Dev>Dev Chat

Which vertical monitor do you use?
I’m thinking of buying a monitor that I can rotate to use as a vertical monitor? Also, I want to know if someone is using it for program...
#monitors#programming
51 4892 20
New
AstonJ
General Dev>Code Editors

Onivim 2 Code Editor
Thanks to @foxtrottwist’s and @Tomas’s posts in this thread: Poll: Which code editor do you use? I bought Onivim! :nerd_face: https://on...
#code-editors/onivim/revery
88 6144 32
New
DevotionGeo
General Dev>Code Editors

Dendron: a personal knowledge management tool on top of VSCode
/vscode#visual-studio-code
30 7372 9
New
AstonJ
Backend>Chat

How to install Ruby 3 with ASDF
In case anyone else is wondering why Ruby 3 doesn’t show when you do asdf list-all ruby :man_facepalming: do this first: asdf plugin-upd...
/ruby#asdf
11 5961 4
New
Exadra37
Linux>Chat

RancherOS is in end of life
Oh just spent so much time on this to discover now that RancherOS is in end of life but Rancher is refusing to mark the Github repo as su...
#linux#rancheros
10 6358 6
New
rustkas
Backend>Chat

Using Regular Expressions in Erlang
Intensively researching Erlang books and additional resources on it, I have found that the topic of using Regular Expressions is either c...
/erlang#regular-expressions
91 5662 43
New
CommunityNews
General Dev>In The News

X can’t stop spread of explicit, fake AI Taylor Swift images
Will Swifties’ war on AI fakes spark a deepfake porn reckoning?
arstechnica.com
/swift
0 8379 0
New
PragmaticBookshelf
Backend>Learning Resources

Engineering Elixir Applications
Develop, deploy, and debug BEAM applications using BEAMOps: a new paradigm that focuses on scalability, fault tolerance, and owning each ...
pragprog.com
#pragprog/elixir#published-book/book-engineering-elixir-applications
40 7136 21
New
PragmaticBookshelf
Backend>Learning Resources

Agile Web Development with Rails 8
Get the comprehensive, insider information you need for Rails 8 with the new edition of this award-winning classic. Sam Ruby @rubys ...
pragprog.com
#pragprog#web-development/ruby/rails#published-book/book-agile-web-development-with-rails-8
12 7404 7
New
Back to top

Sponsor Spotlight

Linux New Media

Publishing Linux Magazine, ADMIN, and MakerSpace for 25+ years.

General Dev>In The News

General Dev In The News ❯

Latest on Devtalk

Devtalk ❯

We ❤️ helpful members!

We reward our most helpful members via our MOTM scheme - by giving away a whopping 25 books per year!

Member of the Month

Devtalk Sponsors

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Erlang Solutions

We build trusted fault-tolerant systems that scale to billions of users.

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

EEF

Supporting innovation across the BEAM ecosystem.

coders51

We build reliable cloud platforms for business-critical systems.

Manning Publications

Develop your skills with books, videos, and courses.

AppSignal

Catch errors, track performance, monitor hosts and more.

WyeWorks

Enabling companies to succeed by building software people love.

Pragmatic Studio

Courses that move you from confusion to "Aha, now I get it!"

Linux New Media

Publishing Linux Magazine, ADMIN, and MakerSpace for 25+ years.

View all our sponsors ❯

Categories:

Sub Categories:

Popular Portals

Devtalk Sponsors

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Erlang Solutions

We build trusted fault-tolerant systems that scale to billions of users.

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

EEF

Supporting innovation across the BEAM ecosystem.

coders51

We build reliable cloud platforms for business-critical systems.

Manning Publications

Develop your skills with books, videos, and courses.

AppSignal

Catch errors, track performance, monitor hosts and more.

WyeWorks

Enabling companies to succeed by building software people love.

Pragmatic Studio

Courses that move you from confusion to "Aha, now I get it!"

Linux New Media

Publishing Linux Magazine, ADMIN, and MakerSpace for 25+ years.

View all our sponsors ❯

We're in Beta

About us Mission Statement See our Roadmap