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cc0ab8c810
By default, in instances where timers are running on a realtime schedule, if a service takes longer to run than the interval of a timer, the service will immediately start again when the previous invocation finishes. This is caused by the fact that the next elapse is calculated based on the last trigger time, which, combined with the fact that the interval is shorter than the runtime of the service, causes that elapse to be in the past, which in turn means the timer will trigger as soon as the service finishes running. This behavior can be changed by enabling the new DeferReactivation setting, which will cause the next calendar elapse to be calculated based on when the trigger unit enters inactivity, rather than the last trigger time. Thus, if a timer is on an realtime interval, the trigger will always adhere to that specified interval. E.g. if you have a timer that runs on a minutely interval, the setting guarantees that triggers will happen at *:*:00 times, whereas by default this may skew depending on how long the service runs. Co-authored-by: Matteo Croce <teknoraver@meta.com>
43 lines
881 B
SYSTEMD
43 lines
881 B
SYSTEMD
timer
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# SPDX-License-Identifier: LGPL-2.1-or-later
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[Unit]
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Description=Daily Cleanup of Temporary Directories
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Documentation=man:tmpfiles.d(5) man:systemd-tmpfiles(8)
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[Timer]
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OnBootSec=15min
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OnUnitActiveSec=1d
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OnBootSec=1s
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OnStartupSec=234
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OnUnitActiveSec=2y
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OnUnitInactiveSec=23434
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OnCalendar=minutely
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OnCalendar=*-*-* *:*:00
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OnCalendar=hourly
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OnCalendar=*-*-* *:00:00
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OnCalendar=daily
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OnCalendar=*-*-* 00:00:00
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OnCalendar=monthly
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OnCalendar=*-*-01 00:00:00
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OnCalendar=weekly
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OnCalendar=Mon *-*-* 00:00:00
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OnCalendar=yearly
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OnCalendar=*-01-01 00:00:00
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OnCalendar=quarterly
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OnCalendar=*-01,04,07,10-01 00:00:00
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OnCalendar=semiannually
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OnCalendar=*-01,07-01 00:00:00
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OnCalendar=Fri 2012-11-23 11:12:13
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Persistent=true
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AccuracySec=24h
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RandomizedDelaySec=234234234
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FixedRandomDelay=true
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DeferReactivation=true
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Persistent=no
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Unit=foo.service
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WakeSystem=false
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RemainAfterElapse=true
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