large-scale/doc/source/journey/guidelines/configuration_guideline.rst

Large Scale Configuration Guideline

Introduction

WSGI

When running a python app as WSGI, you need to use maximum 1 thread!

Example with apache config:

$ grep WSGIDaemonProcess /etc/apache2/sites-available/10-cinder_wsgi.conf
WSGIDaemonProcess cinder-api display-name=cinder_wsgi group=cinder processes=8 threads=1 user=cinder

Nova

api.max_limit

Documentation link: https://docs.openstack.org/nova/latest/configuration/config.html#api.max_limit

This settings needs to be tuned in order to make sure that Nova API will give you an expected number of objects..

Neutron