yahoo-eng-team team mailing list archive

[Dan Smith <dms@xxxxxxxxxxxxx>]

Public bug reported:

During a normal tempest run, way (way) too many object lazy-loads are
being triggered, which causes extra RPC and database traffic. In a given
tempest run, we should be able to pretty much prevent any lazy-loads in
that predictable situation. The only case where we might want to have
some is where we are iterating objects and conditionally taking action
that needs to load extra information.

On a random devstack-tempest job run sampled on 1-Feb-2016, a lot of
lazy loads were seen:

  grep 'Lazy-loading' screen-n-cpu.txt.gz  -c
  624

We should be able to vastly reduce this number without much work.

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1540526

Title:
  Too many lazy-loads in predictable situations

Status in OpenStack Compute (nova):
  New

Bug description:
  During a normal tempest run, way (way) too many object lazy-loads are
  being triggered, which causes extra RPC and database traffic. In a
  given tempest run, we should be able to pretty much prevent any lazy-
  loads in that predictable situation. The only case where we might want
  to have some is where we are iterating objects and conditionally
  taking action that needs to load extra information.

  On a random devstack-tempest job run sampled on 1-Feb-2016, a lot of
  lazy loads were seen:

    grep 'Lazy-loading' screen-n-cpu.txt.gz  -c
    624

  We should be able to vastly reduce this number without much work.

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