IONOS Sustained CPU Endurance Run
6vCPU 12GB - Apr 01 2025

Go to IONOS



The sustained CPU endurance test runs a cpu intensive task in a loop for 24 hours. As maxing out the cpu might be considered abusive, the tests aims to use no more than 50% of each cpu core on the VPS.

The purpose of this type of test is

  • first to evaluate the speed to the VPS,
  • second to evaluate the stability over time of the cpu available to the VPS
  • and third to detect VPS where the CPU is throttled and the performance goes down over time after cpu utilization goes over a threshold the provider considers excessive for a particular plan.

The performance is measured at regular intervals in terms of tasks executed per hour, amount of idle cpu and amount of "cpu steal".

Provider: IONOS
Plan: 6vCPU 12GB
Number of CPU cores: 12
Burstable CPU resources: no
CPU type: Intel Xeon Processor (Skylake, IBRS)


DescriptionValue
Target CPU usage Overall CPU that the endurance test tries to use across all CPU cores on the VM. 50%
Average iterations per hour Average number of tasks executed per hour. It represents how much work the VPS was able to achieve per hour. Higher numbers are better. 45977
Coefficient of variation iterations per hour This represents the dispersion of the number of tasks per hour. It's the standard deviation divided by the mean number of tasks per hour. It's an indicator on stability of the performance of the VPS. A low standard deviation means the VPS speed stayed close to constant. A high standard deviation means performance varied significantly during the test. 2.75%
Average CPU idle Average percentage of CPU that was idle during the test. This number should be close to 50% unless the CPU is being throttled like in burstable VPS plans. 49.8%
Min CPU idle Minimum percentage of CPU idle during the test. 49.6%
Average CPU steal Average percentage of CPU steal during the test. Lower is better. 0.00%
Max CPU steal Maximum percentage of CPU steal during the test. 0.00%


Number of tasks completed per hour




Date Number of iterations per hour CPU Idle % CPU Steal %
April 02, 2025 22:00 UTC 46281 52.17 0.0
April 02, 2025 20:00 UTC 45963 49.81 0.0
April 02, 2025 18:00 UTC 46138 49.81 0.0
April 02, 2025 16:00 UTC 45935 49.81 0.0
April 02, 2025 14:00 UTC 45028 49.82 0.0
April 02, 2025 12:00 UTC 44313 49.82 0.0
April 02, 2025 10:00 UTC 44644 49.8 0.0
April 02, 2025 08:00 UTC 44258 49.81 0.0
April 02, 2025 06:00 UTC 46348 49.8 0.0
April 02, 2025 04:00 UTC 47383 49.81 0.0
April 02, 2025 02:00 UTC 47904 49.81 0.0
April 02, 2025 00:00 UTC 47432 49.81 0.0
April 01, 2025 22:00 UTC 46706 49.72 0.0

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