Hi Colin, Yes missing . was just a typo. I tried override.conf in /etc/systemd/system/systemd-nspawn at appscont.service.d/, still I do not see any change in CPU utilization. Container processes(sh and sha1sum) are using 50% CPU irrespective of CPUQuota in  ExecStart=/usr/bin/systemd-nspawn --quiet --boot --link-journal=try-guest --machine=%i -n --property=CPUQuota=5% I tried CPUQuota=5% under service section in override.conf instead of ExecStart, still the CPU usage is 50% And also I tried both in ExecStart as well as separate entry of CPUQuota=5% under service section after ExecStart, still the CPU usage is 50% Attached the systemd-cgls output for machine.slice. Regards Mahipal On Thursday, 19 July, 2018, 10:41:14 AM GMT-4, Colin Guthrie <gmane at colin.guthr.ie> wrote: patlollamahipal at yahoo.co.in wrote on 18/07/18 21:04: > *override.conf* is effective when it is placed in > */etc/systemd/system/systemd-nspawn at service.d/* I think you missed a . above: /etc/systemd/system/systemd-nspawn at .service.d/* > > If I have file > *systemd-nspawn at appscont.service *in */etc/systemd/system.control/systemd-nspawn at appscont.service.d, > *it is not effective, it's using the template file. there is no system.control folder. You should place a file called override.conf (or anything.conf) in a folder: /etc/systemd/system/systemd-nspawn at appscont.service.d/ if you want the overrides defined in the .conf file to only apply to that one machine. All the best and HTHs Col -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job:  Tribalogic Limited http://www.tribalogic.net/ Open Source:  Mageia Contributor http://www.mageia.org/  PulseAudio Hacker http://www.pulseaudio.org/  Trac Hacker http://trac.edgewall.org/ -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.freedesktop.org/archives/systemd-devel/attachments/20180719/a170f7c8/attachment-0001.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: machine.slice.JPG Type: image/jpeg Size: 85019 bytes Desc: not available URL: <https://lists.freedesktop.org/archives/systemd-devel/attachments/20180719/a170f7c8/attachment-0001.jpe>