On 10/22/2018 11:59 AM, Matt Riedemann wrote:
Thanks for this. Have you debugged to the point of knowing where the initial DB query is starting from?

Looking at history, my guess is this is the change which introduced it for all requests:


From that change, as far as I can tell, we only needed to pre-join on metadata because of setting the "launch_metadata" variable:


I don't see anything directly using system_metadata, although that one is sometimes tricky and could be lazy-loaded elsewhere.

I do know that starting in ocata we use system_metadata for dynamic vendor metadata:


Added in change: https://review.openstack.org/#/c/417780/

But if you don't provide vendor data then that should not be a problem.




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