[systemd-bugs] [Bug 72611] New: systemctl is-enabled scales poorly with many units

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=72611

          Priority: medium
            Bug ID: 72611
          Assignee: systemd-bugs at lists.freedesktop.org
           Summary: systemctl is-enabled scales poorly with many units
        QA Contact: systemd-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: david at davidstrauss.net
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: general
           Product: systemd

Created attachment 90621
  --> https://bugs.freedesktop.org/attachment.cgi?id=90621&action=edit
unit_file_get_state trace

We're seeing 10+ second delays checking whether a unit is enabled on a system
with a few thousand services. I've attached a trace of where it seems to be
spending most of its time (in a cumulative way), based on perf data.

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