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#1 2018-11-13 17:27:34

Miha
Member
Registered: 2013-11-30
Posts: 9

Archlinux kernel and ESXi

All my archlinux servers usually live on ESXi. For years I have been struggling with performance issues on virtual environment.
Tried with CK kernels, custom kernels, optimisations.
Archlinux performs very bad on ESXi. Disk speed is very slow. Tried with many filesystems. No errors in kernel logs.

Lately I tried Centos7 and it performs excellent out of box. So I installed first production server after more than 10 years on Centos.
What can be done on Arch to perform better?

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#2 2018-11-13 18:14:10

progandy
Member
Registered: 2012-05-17
Posts: 3,331

Re: Archlinux kernel and ESXi

Did you try the same kernel versions with centos and arch and did you compare the kernel configuration (e.g. /proc/config.gz)


| alias CUTF='LANG=en_XX.UTF-8@POSIX ' |

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#3 2018-11-14 07:00:41

Miha
Member
Registered: 2013-11-30
Posts: 9

Re: Archlinux kernel and ESXi

No I did not try the same kernels. But the issue persists from kernels 3.*
Centos7 is on kernel 3.10 and Arch is on latest 4.* kernel. I did compare the configs, but there are many differences.
I think the issue is in kernel clock. But still have no energy to test combinations. Previously I used CK kernels, that were better.
But it would be nice to have a stock kernel that behaves nicely in virtual environments.

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#4 2018-11-14 13:09:05

Lone_Wolf
Member
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 6,779

Re: Archlinux kernel and ESXi

Which ESXi version and has it been updated to latest patch ?

https://www.virten.net/vmware/esxi-rele … r-history/


Multi-init booting with apg Openrc and systemd coexisting
Automounting : not needed, i prefer pmount
Aur helpers : makepkg + my own local repo === rarely need them

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#5 2018-11-24 10:17:29

Miha
Member
Registered: 2013-11-30
Posts: 9

Re: Archlinux kernel and ESXi

Different ESXi versions. This issue persist for several years. It is also on latest ESXi 6.7. It has probably something to do with cpu clock / interrupt frequency or something around this.

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