hello On openstack wallaby version openstack server list result too slow : | GET http://example.com:35357/v3 | 0.040385 | | POST http://example.com:35357/v3/auth/tokens | 0.49567 | | GET http://example.com:9292/ | 0.011694 | | GET http://example.com:8774/v2.1/servers/detail?all_tenants=True | 16.032512 | | GET http://example.com:9292/v2/images | 0.241679 | | GET http://example.com:9292/v2/images?marker=b17469eb-4548-4fbb-b871-5880323a7a7... | 0.205339 | | GET http://example.com:9292/v2/images?marker=eb00ee00-4401-4e59-bf92-602be2e45c4... | 0.204854 | | GET http://example.com:9292/v2/images?marker=edf7d33a-286a-4a00-a8d8-4b0055d0609... | 0.203524 | | GET http://example.com:9292/v2/images?marker=75ab289d-90ce-496c-97a4-6fdd247c862... | 0.215708 | | GET http://example.com:9292/v2/images?marker=b4eaf24c-94dc-4f2f-bd54-3eecbf290d7... | 0.28073 | | GET http://example.com:8774/v2.1/flavors/detail?is_public=None | 0.641211 | | Total | 18.573306 as you see nova api takes 16 seconds to load . I have one project with 1100 instance on it