[ovirt-users] Memory for Engine Machine

[Roy Golan]

On Tue, Feb 21, 2017 at 12:12 AM Simone Tiraboschi <stirabos at redhat.com>
wrote:

> On Mon, Feb 20, 2017 at 9:39 PM, Roy Golan <rgolan at redhat.com> wrote:
>
>
>
> On Feb 20, 2017 9:35 PM, "Doug Ingham" <dougti at gmail.com> wrote:
>
> 16GB is just the recommended amount of memory. The more items your Engine
> has to manage, the more memory it will consume, so whilst it might not be
> using that amount of memory at the moment, it will do as you expand your
> cluster.
>
>
> It will never really need this amount of memory. There is no reason to
> configure the heap for 16gb.
>
>
>
> On 20 February 2017 at 16:22, FERNANDO FREDIANI <fernando.frediani at upx.com
> > wrote:
>
> Hello folks
>
> I have a Engine dedicated machine running with 4GB of memory. It has been
> working fine without any apparent issues.
>
> If I check the system memory usage it rarely goes over 1.5GB.
>
> But when I upgrade oVirt Engine it complains with the following message:
> "[WARNING] Less than 16384MB of memory is available".
>
>
> Please open a bug with all the details, we should address that.
>
>
> Currently we are tuning the java heap size to 1/4 of the system memory.
> On hosted-engine-setup side we propose to assign to the engine VM 16GB (so
> java heap = 4GB) as recommended and 4GB as a minimum suggested value.
>
>
So for a machine with 64Gb we would put 16Gb doesn't make sense.(for non
hosted engine but in the future this may change) . we should elaborate the
calculation to top 4Gb.

Also what is the purpose of the warning that you have less than 16Gb of
available ram?


>
>
> Why is all that required if the real usage doesn't show that need ? Or am
> I missing anything ?
>
> Fernando Frediani
>
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> --
> Doug
>
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