thank you for your replay, I am happy if it works 1. check 2. check 3.1 check -> I cant see where is use this config file later, or it is just a backup? 4.1 check i changed to <ovirt-vm:memGuaranteedSize type="int">16384</ovirt-vm:memGuaranteedSize> <ovirt-vm:minGuaranteedMemoryMb type="int">16384</ovirt-vm:minGuaranteedMemoryMb> and <maxMemory slots='16' unit='KiB'>15625000</maxMemory> <memory unit='KiB'>15625000</memory> <currentMemory unit='KiB'>15625000</currentMemory> after write, quite und open these values have changed back to <memory unit='KiB'>4194304</memory> <currentMemory unit='KiB'>4194304</currentMemory> BREAK ;) after stopping the hosted engine with hosted-engine --vm-shutdown and powering it up with hosted-engine vm-start everything is reverted ;( BREAK hosted engine is now up and running, maintenance ist still global, changed again with virtsh edit HostedEngine. as written above it changes back I will wait for tomorrow. Or did I missunderstand something In which file the maxmem is hidden? thx shb