Bug 1257897
| Summary: | systemd-cgtop shows memory usage for services with MemoryAccounting=no | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Branislav Blaškovič <bblaskov> |
| Component: | systemd | Assignee: | systemd-maint |
| Status: | CLOSED CANTFIX | QA Contact: | qe-baseos-daemons |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 7.2 | CC: | lnykryn, systemd-maint-list |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-08-28 11:28:12 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This is basically expected, if you turn on memory accounting for one service, whole slice will have memory accounting due to cgroup implementation. http://www.freedesktop.org/software/systemd/man/systemd.resource-control.html#MemoryAccounting= Then every new proccess in such slice will have memory accounting (try to restart crond). |
Version-Release number of selected component (if applicable): systemd-219-11.el7.x86_64 Description of problem: If I take a look at systemd-cgtop I can see that we are not counting memory consuption for any slice: Path Tasks %CPU Memory Input/s Output/s / 89 0.7 212.2M - - /system.slice/ModemManager.service 1 - - - - /system.slice/NetworkManager.service 2 - - - - /system.slice/auditd.service 1 - - - - /system.slice/avahi-daemon.service 2 - - - - /system.slice/crond.service 1 - - - - /system.slice/dbus.service 1 - - - - /system.slice/gssproxy.service 1 - - - - /system.slice/lvm2-lvmetad.service 1 - - - - /system.slice/polkit.service 1 - - - - /system.slice/postfix.service 3 - - - - /system.slice/rhnsd.service 1 - - - - /system.slice/rhsmcertd.service 1 - - - - /system.slice/rpc-statd.service 1 - - - - /system.slice/rpcbind.service 1 - - - - /system.slice/rsyslog.service 1 - - - - /system.slice/sshd.service 1 - - - - /system.slice/system-getty.slice/getty 1 - - - - /system.slice/system-serial\x2dgetty.slice/serial-getty 1 - - - - /system.slice/systemd-journald.service 1 - - - - /system.slice/systemd-logind.service 1 - - - - /system.slice/systemd-udevd.service 1 - - - - /system.slice/tuned.service 1 - - - - /system.slice/wpa_supplicant.service 1 - - - - /user.slice/user-0.slice/session-3.scope 1 - - - - /user.slice/user-0.slice/session-4.scope 4 - - - - Then I set MemoryAccounting for sshd in its service file, restart it and run systemd-cgtop again: Path Tasks %CPU Memory Input/s Output/s / 90 1.3 217.6M - - /system.slice - - 948.0K - - /system.slice/ModemManager.service 1 - - - - /system.slice/NetworkManager.service 2 - 4.0K - - /system.slice/auditd.service 1 - 4.0K - - /system.slice/avahi-daemon.service 2 - - - - /system.slice/crond.service 1 - - - - /system.slice/dbus.service 1 - - - - /system.slice/gssproxy.service 1 - - - - /system.slice/lvm2-lvmetad.service 1 - - - - /system.slice/polkit.service 1 - - - - /system.slice/postfix.service 3 - - - - /system.slice/rhnsd.service 1 - - - - /system.slice/rhsmcertd.service 1 - - - - /system.slice/rpc-statd.service 1 - - - - /system.slice/rpcbind.service 1 - - - - /system.slice/rsyslog.service 1 - 4.0K - - /system.slice/sshd.service 1 - 856.0K - - /system.slice/system-getty.slice/getty 1 - - - - /system.slice/system-serial\x2dgetty.slice/serial-getty 1 - - - - /system.slice/systemd-journald.service 1 - 80.0K - - /system.slice/systemd-logind.service 1 - - - - /system.slice/systemd-udevd.service 1 - - - - /system.slice/tuned.service 1 - - - - /system.slice/wpa_supplicant.service 1 - - - - /user.slice/user-0.slice/session-3.scope 1 - - - - /user.slice/user-0.slice/session-4.scope 4 - - - - This is weird, because it's counting memory for auditd, NetworkManager and others. But they don't have MemoryAccounting: # systemctl show auditd.service | grep MemoryAccounting MemoryAccounting=no # systemctl show NetworkManager.service | grep MemoryAccounting MemoryAccounting=no In systemd-cgtop man page [1] is: unless "CPUAccounting=1", "MemoryAccounting=1" and "BlockIOAccounting=1" are enabled for the services in question, no resource accounting will be available for system services and the data shown by systemd-cgtop will be incomplete [1] http://www.freedesktop.org/software/systemd/man/systemd-cgtop.html