yahoo-eng-team team mailing list archive

[Ed Leafe <ed@xxxxxxxxx>]

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.

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