Public bug reported:
ExtendedVolumes has poor performance because it query block device
mapping formance for every instances.
that's because block_device_mapping_get_all_by_instance() only takes on
instance_uuid.
if this function taks instance_uuid list. then we can have better performance
with IN operator with just on query.
** Affects: nova
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1483335
Title:
ExtendedVolumes extension has poor performance
Status in OpenStack Compute (nova):
New
Bug description:
ExtendedVolumes has poor performance because it query block device
mapping formance for every instances.
that's because block_device_mapping_get_all_by_instance() only takes on
instance_uuid.
if this function taks instance_uuid list. then we can have better performance
with IN operator with just on query.
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https://bugs.launchpad.net/nova/+bug/1483335/+subscriptions
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