git.net

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: KVM Max Guests Limit



On 11/8/18 11:20 PM, Simon Weller wrote:
> I think these is legacy and a guess back in the day. It was 50 at one point and it was lifted higher a few releases. ago.
> 

I see. I'm about to do a test with a bunch of 128GB hypervisors and
spawning a lot of 128M VMs. Trying to see where the limit might be and
also stress the VR a bit by loading a lot of DHCP entries.

Wido

> 
> 
> 
> ________________________________
> From: Ivan Kudryavtsev <kudryavtsev_ia@xxxxxxxxx>
> Sent: Thursday, November 8, 2018 3:58 PM
> To: dev
> Subject: Re: KVM Max Guests Limit
> 
> Hi all, +1 for higher numbers.
> 
> чт, 8 нояб. 2018 г. в 16:32, Wido den Hollander <wido@xxxxxxxxx>:
> 
>> Hi,
>>
>> I see that for KVM we set the limit to 144 guests by default, can
>> anybody tell me why we have this limit set to 144?
>>
>> Searching a bit I found this:
>> https://access.redhat.com/articles/rhel-kvm-limits
>>
>> "This guest limit does not apply to Red Hat Enterprise Linux with
>> Unlimited Guests. There is no guest limit for Red Hat Enterprise
>> Virtualization"
>>
>> There is always a limit somewhere, but why do we set it to 144?
>>
>> I would personally vote for increasing this to 500 or something so that
>> users don't run into it that easily.
>>
>> Also, the log line is printed in DEBUG mode only when a host reaches
>> this limit, so I created a PR to set this to INFO:
>> https://github.com/apache/cloudstack/pull/3013
>>
>> Any input?
>>
>> Wido
>>
> 
> 
> --
> With best regards, Ivan Kudryavtsev
> Bitworks LLC
> Cell RU: +7-923-414-1515
> Cell USA: +1-201-257-1512
> WWW: http://bitworks.software/ <http://bw-sw.com/>
>