Exercise 4.2 Stress Test

Hi
I am running two node cluster on my MacMini which has 64GB RAM. For each node I have allocated 16GB and I tried allocating more memory. But so far I have not been able to hit the memory limit. What should I do? reallocate lower memory for VMs or keep tweaking parameters that I pass to hog.yaml?
Appreciate your thoughts.
Regards
Rama
Comments
-
Hello,
Perhaps I am misunderstanding what you have written but it sounds like you are adding more memory instead of increasing the amount of memory that stress is consuming. If you think about the name of the application, stress, the point is to consume resources. In this step we increase the amount of stress on the node until it runs out of resources. The learning objective is to understand what happens to a container or a pod when it uses to much CPU or memory. Instead of adding memory, which would reduce the percentage of memory used you are increasing it? Return the node memory to what you had before, perhaps 8G, then change the parameters of hog to use more resources.
Regards,
0 -
My thinking was to get the pod to restart and I never managed to get a single restart.
Configuration wise - CP node is now 8GB and 2VCPUs, Worker node is also 8GB and 2VCPUs.
I have tried with the following args:
spec:
containers:
- image: vish/stress
imagePullPolicy: Always
name: stress
resources:
limits:
cpu: "1"
memory: "10Gi"
requests:
cpu: "0.5"
memory: "500Mi"
args:
- -cpus
- "2"
- -mem-total
- "950Mi"
- -mem-alloc-size
- "100Mi"
- -mem-alloc-sleep
- "1s"So trying to see different options to tweak so that I will be able to see the stress pod restart,
0 -
Increase CPU more than allotted. Then reset cpu to a lower amount and increase memory. Give the pod a minute or more to gradually increase usage. Edit the args, not the limits.
Regards
0 -
Thank you this worked.
0
Categories
- 9.1K All Categories
- 15 LFX Mentorship
- 68 LFX Mentorship: Linux Kernel
- 381 Linux Foundation Boot Camps
- 235 Cloud Engineer Boot Camp
- 75 Advanced Cloud Engineer Boot Camp
- 30 DevOps Engineer Boot Camp
- 8 Cloud Native Developer Boot Camp
- 983 Training Courses
- 15 LFC110 Class Forum
- 16 LFD102 Class Forum
- 106 LFD103 Class Forum
- 6 LFD121 Class Forum
- 56 LFD201 Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum
- 19 LFD254 Class Forum
- 450 LFD259 Class Forum
- 90 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 16 LFS200 Class Forum
- 715 LFS201 Class Forum
- LFS201-JP クラス フォーラム
- 283 LFS211 Class Forum
- 51 LFS216 Class Forum
- 27 LFS241 Class Forum
- 28 LFS242 Class Forum
- 19 LFS243 Class Forum
- 6 LFS244 Class Forum
- 12 LFS250 Class Forum
- LFS250-JP クラス フォーラム
- 113 LFS253 Class Forum
- 814 LFS258 Class Forum
- 8 LFS258-JP クラス フォーラム
- 54 LFS260 Class Forum
- 81 LFS261 Class Forum
- 18 LFS262 Class Forum
- 76 LFS263 Class Forum
- 15 LFS264 Class Forum
- 10 LFS266 Class Forum
- 10 LFS267 Class Forum
- 9 LFS268 Class Forum
- 6 LFS269 Class Forum
- 183 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- 191 LFW211 Class Forum
- 114 LFW212 Class Forum
- 880 Hardware
- 207 Drivers
- 74 I/O Devices
- 44 Monitors
- 115 Multimedia
- 205 Networking
- 98 Printers & Scanners
- 82 Storage
- 730 Linux Distributions
- 85 Debian
- 64 Fedora
- 12 Linux Mint
- 13 Mageia
- 22 openSUSE
- 127 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 349 Ubuntu
- 450 Linux System Administration
- 33 Cloud Computing
- 64 Command Line/Scripting
- Github systems admin projects
- 89 Linux Security
- 76 Network Management
- 105 System Management
- 45 Web Management
- 51 Mobile Computing
- 19 Android
- 19 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 501 Off Topic
- 121 Introductions
- 193 Small Talk
- 19 Study Material
- 756 Programming and Development
- 243 Kernel Development
- 479 Software Development
- 903 Software
- 247 Applications
- 178 Command Line
- 2 Compiling/Installing
- 73 Games
- 314 Installation
- 26 All In Program
- 26 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)