** Changed in: nova
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1359808
Title:
extended_volumes slows down the nova instance list by 40..50%
Status in OpenStack Compute (nova):
Fix Released
Bug description:
When listing ~4096 instances, the nova API (n-api) service has high CPU(100%)
usage because it does individual SELECTs,
for every server's block_device_mapping. This adds ~20-25 sec to the response
time.
Please use more efficient way for getting the block_device_mapping,
when multiple instance queried.
This line initiating the individual select:
https://github.com/openstack/nova/blob/4b414adce745c07fbf2003ec25a5e554e634c8b7/nova/api/openstack/compute/contrib/extended_volumes.py#L32
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