Power on VM when esx detect that this VM is poweroff

Hi,

   I have an esxi server with serveral VM's, Linux and Windows VM's..The esx host have 128Gb Ram and one of the more importants virtual machines have 80Gb of RAM.Randomly this VM (Centos 7) unexpectedly have poweroff, I registered this case in the last year 4 times...I don't see any information and logs on esx and vm.. It's posible that Esx detect a high consume of memory in this VM an shutdown it to prevent block Esx host.  The rest of the VM are in esx ok..all poweron...

Other question, Does the esx host have any mechanism to turn on a vm when it detects that it is turned off?

Best Regards.

Thanks

Eduardo