Public bug reported:
In Kilo we added the ability of the HostManager to track information
about the instances on compute nodes, so that filters that needed this
information didn't have to constantly make database calls to get it.
However, the call that is used by HostManager will return deleted
instance records, which is not useful information and degrades the
performance. In a large deployment, the overhead of loading the records
for thousands of deleted instances is causing serious performance
issues.
** Affects: nova
Importance: Undecided
Assignee: Ed Leafe (ed-leafe)
Status: New
** Tags: scheduler
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https://bugs.launchpad.net/bugs/1524421
Title:
Host Manager reads deleted instance info on startup
Status in OpenStack Compute (nova):
New
Bug description:
In Kilo we added the ability of the HostManager to track information
about the instances on compute nodes, so that filters that needed this
information didn't have to constantly make database calls to get it.
However, the call that is used by HostManager will return deleted
instance records, which is not useful information and degrades the
performance. In a large deployment, the overhead of loading the
records for thousands of deleted instances is causing serious
performance issues.
To manage notifications about this bug go to:
https://bugs.launchpad.net/nova/+bug/1524421/+subscriptions
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