On Ma, 23 nov 21, 09:28:39, David Wright wrote: > On Tue 23 Nov 2021 at 07:51:32 (-0500), Greg Wooledge wrote: > > On Tue, Nov 23, 2021 at 12:05:37PM +0000, Jonathan Dowland wrote: > > > On Mon, Nov 22, 2021 at 11:39:46AM -0500, Greg Wooledge wrote: > > > > I don't know the exact time that I closed the login shell on tty2. It > > > > *could* have been at exactly 11:19:00 but that seems like a suspiciously > > > > round number (and a suspiciously long time after I started the service). > > > > > > You don't, but your system(d) does: the system instance, not the user > > > instance. > > > > > > From my "journalctl --follow" output, after a "su -" and then > > > immediately after closing the resulting shell: > > > > > > Nov 23 12:03:27 coil su[1330250]: pam_unix(su-l:session): session > > > closed for user root > > > > Nov 22 11:18:27 unicorn systemd[1604310]: Started Sleep command for testing. > > Nov 22 11:18:50 unicorn login[1604301]: pam_unix(login:session): session > > closed> > > Nov 22 11:18:50 unicorn systemd[1]: getty@tty2.service: Succeeded. > > Nov 22 11:18:50 unicorn systemd[1]: session-7634.scope: Succeeded. > > Nov 22 11:18:50 unicorn systemd[1]: getty@tty2.service: Scheduled restart > > job, > > > Nov 22 11:18:50 unicorn systemd-logind[611]: Session 7634 logged out. > > Waiting f> > > Nov 22 11:18:50 unicorn systemd[1]: Stopped Getty on tty2. > > Nov 22 11:18:50 unicorn systemd[1]: Started Getty on tty2. > > Nov 22 11:18:50 unicorn systemd-logind[611]: Removed session 7634. > > Nov 22 11:18:50 unicorn pulseaudio[1604331]: Error opening PCM device > > front:1: > > > Nov 22 11:18:50 unicorn systemd[1604310]: pulseaudio.service: Succeeded. > > Nov 22 11:19:00 unicorn systemd[1]: Stopping User Manager for UID 1004... > > > > This basically confirms my guesswork: the "User Manager" isn't stopped > > immediately when the last login session is closed. There's some delay. > > Maybe it's the next time the clock reads *:00 or maybe it's 10 seconds. > > It looks like you can set it here: > > $ grep 1min /etc/systemd/system.conf > #DefaultTimerAccuracySec=1min > $ man systemd-system.conf | grep -A7 DefaultTimerAccuracySec > DefaultTimerAccuracySec= > Sets the default accuracy of timer units. This controls the global > default > for the AccuracySec= setting of timer units, see systemd.timer(5) > for > details. AccuracySec= set in individual units override the global > default > for the specific unit. Defaults to 1min. Note that the accuracy of > timer > units is also affected by the configured timer slack for PID 1, see > TimerSlackNSec= above.
By default systemd is using a random time within the specified accuracy in order to avoid to many timers running at once. It's completely unrelated to stopping processes (as far as the systemd-as-pid-1 is concerned, the User Manager is just another process to be stopped) when the user logs out (the default unless 'linger'ring is enabled for the particular user). Kind regards, Andrei -- http://wiki.debian.org/FAQsFromDebianUser
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