# 100% CPU usage under ESXi 6.5 (18071574)

**URL:** <https://forums.rockylinux.org/t/100-cpu-usage-under-esxi-6-5-18071574/3883>\
**Category:** Rocky Linux Help & Support\
**Created:** [August 23, 2021, 6:18pm UTC](https://forums.rockylinux.org/t/100-cpu-usage-under-esxi-6-5-18071574/3883 "2021-08-23T18:18:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![SteveShockley](https://avatars.discourse-cdn.com/v4/letter/s/49beb7/32.png) [@SteveShockley](https://forums.rockylinux.org/u/SteveShockley)\
**Post date:** [August 23, 2021, 6:18pm UTC](https://forums.rockylinux.org/t/100-cpu-usage-under-esxi-6-5-18071574/3883/1 "2021-08-23T18:18:41Z")

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When I create a Rocky Linux 8.4 VM under ESXi 6.5, the VM continuously shows 100% CPU usage of any/all allocated cores in the VM console, although the OS shows minimal CPU usage. When I install CentOS 8.4, CPU usage in the VM console approximately matches the OS. Any suggestions? I’ve set the OS type to CentOS Linux 7 (64-bit) or RHEL 7 (64-bit). open-vm-tools is installed, and the machine is a Dell R610 with two X5675 CPUs. Please let me know if any other details are useful, thanks.

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**Author:** ![warron.french](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/warron.french/32/869_2.png) [@warron.french](https://forums.rockylinux.org/u/warron.french)\
**Post date:** [August 25, 2021, 12:32am UTC](https://forums.rockylinux.org/t/100-cpu-usage-under-esxi-6-5-18071574/3883/2 "2021-08-25T00:32:45Z")

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@SteveShockley, welcome to the Rocky Linux Forums.

1. How many vCPUs did you allocate to your VM?
2. How many CPUs total are on the **physical** host?
3. How many vCPUs have you already allocated?

I saw this problem with VMware ESXi in a professional environment where there was a problem with over-subscription of CPUs and it was not obvious. _That could be the problem in this case for you as well._

**Good luck,**  
@warron.french

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**Author:** ![brian](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.rockylinux.org/brian/32/5777_2.png) [@brian](https://forums.rockylinux.org/u/brian)\
**Post date:** [August 25, 2023, 4:06am UTC](https://forums.rockylinux.org/t/100-cpu-usage-under-esxi-6-5-18071574/3883/3 "2023-08-25T04:06:11Z")

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Closed on August 25, 2023, 4:06am UTC