Public bug reported:
See: http://logs.openstack.org/89/639889/3/check/placement-
perfload/e56f0a0/logs/placement-api.log (or any other recent perfload
run) where there are multiple errors when trying to create aggregates.
Various bits of work have been done to try to fix that up, but
apparently none of them have fully worked.
Tetsuro had some ideas on using better transaction defaults in mysql's
configs, but I was reluctant to do that because presumably a lot of
people install and use the defaults and ideally our solution would "just
work" with the defaults.
Perhaps I'm completely wrong about that. In a very high concurrency
situation (which is what's happening in the perfload job) tweaks of the
db may be required.
In any case, this probably needs more attention: whatever the solution
we don't want to be able to create 500s so easily. And the solution is
not simply to make them 4xx. We want the problem to not happen.
** Affects: nova
Importance: Low
Status: New
** Tags: placement
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1818498
Title:
Placement aggregate creation continues to be unstable under very high
load
Status in OpenStack Compute (nova):
New
Bug description:
See: http://logs.openstack.org/89/639889/3/check/placement-
perfload/e56f0a0/logs/placement-api.log (or any other recent perfload
run) where there are multiple errors when trying to create aggregates.
Various bits of work have been done to try to fix that up, but
apparently none of them have fully worked.
Tetsuro had some ideas on using better transaction defaults in mysql's
configs, but I was reluctant to do that because presumably a lot of
people install and use the defaults and ideally our solution would
"just work" with the defaults.
Perhaps I'm completely wrong about that. In a very high concurrency
situation (which is what's happening in the perfload job) tweaks of
the db may be required.
In any case, this probably needs more attention: whatever the solution
we don't want to be able to create 500s so easily. And the solution is
not simply to make them 4xx. We want the problem to not happen.
To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1818498/+subscriptions
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