[CentOS] Linux ate my RAM...

On Nov 18, 2015, at 5:51 PM, Itamar Reis Peixoto <itamar at ispbrasil.com.br> wrote:
> 
> On 2015-11-18 19:41, Warren Young wrote:
>> On Nov 18, 2015, at 1:20 PM, Kwan Lowe <kwan.lowe at gmail.com> wrote:
> 
> try systemd-nspawn and use it instead of virtualizing, will save you some bits of memory.

That’s fine if you’re after the isolation feature of VMs, but no good if you’re trying to run entirely different OSes.  nspawn/containers/jails don’t let me build EL5 RPMs on my EL7 box, and they certainly aren’t going to run my Windows XP IE7 VM, which I use to ensure that our web app is still semi-functional on it.

Still, good tip, and worth keeping in mind the next time I find myself considering a heavier solution.