*** This bug is a duplicate of bug 1485025 ***
Given this bug was reported before
https://review.openstack.org/#/c/213340/ landed then you wouldn't have
that fix, but it would be useful to know if it resolves your issue.
** This bug has been marked a duplicate of bug 1485025
The simple-tenant-usage API should pull instance flavor attrs rather than
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os-simple-tenant-usage performs poorly with many instances
Status in OpenStack Compute (nova):
The SQL underlying the os-simple-tenant-usage API call results in very
slow operations when the database has many (20,000+) instances. In
testing, the objects.InstanceList.get_active_by_window_joined call in
takes 24 seconds to run.
Some basic timing analysis has shown that the initial query in
nova/db/sqlalchemy/api.py:instance_get_active_by_window_joined runs in
*reasonable* time (though still 5-6 seconds) and the bulk of the time
is spent in the subsequent _instances_fill_metadata call which pulls
in system_metadata info by using a SELECT with an IN clause containing
the 20,000 uuids listed, resulting in execution times over 15 seconds.
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