Hi Stephen, I've just tested in Virtualbox, same thing happened to CentOS but the loss is lesser than in AWS.
Both machines are allocated with 4096MB in Vagrantfile. ``` [vagrant@my-multi-centos-72 ~]$ cat /proc/meminfo MemTotal: 3882384 kB MemFree: 3527648 kB vagrant@my-multi-ubuntu-1604:~$ cat /proc/meminfo MemTotal: 4046708 kB MemFree: 3695204 kB ``` On Mon, Aug 1, 2016 at 8:29 PM Stephen John Smoogen <[email protected]> wrote: > On 1 August 2016 at 07:30, Dũng Trần-Dương <[email protected]> > wrote: > > Hi, > > > > I launched an AWS instance `t2.medium` (use CentOS 7 image > "ami-7abd0209", > > product code: https://aws.amazon.com/marketplace/pp/B00O7WM7QW), which > is > > supposed to have 4GB Memory in total, but turn out it is only "3.5GB". > > > > A rough guess would be that the system has reserved some memory for > crashkernel but that is a guess. I would look at /proc/commandline to > see what the kernel is starting up with. > > > -- > Stephen J Smoogen. > _______________________________________________ > CentOS-virt mailing list > [email protected] > https://lists.centos.org/mailman/listinfo/centos-virt >
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