openstack/openstack-ansible-os_glance
Code Issues Proposed changes

Reduce number of processes on small systems

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Even the most modest 4C/8T system would run with the maximum 16 processes
due to the calculation being VCPU*2.

This patch makes it clearer that glance_api_threads is the number of
physical CPU, and halves glance_wsgi_processes to physical CPU*2 for
a hyperthreaded CPU.

Change-Id: I71357a585a053d0b4e9316cc69c681caee2259da
This commit is contained in:
Jonathan Rosser 2020-02-04 13:13:55 +00:00 committed by Dmitriy Rabotyagov (noonedeadpunk)
parent 3a9ebca90e
commit cbbd0dee61
1 changed files with 2 additions and 2 deletions
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4
defaults/main.yml
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@ -187,7 +187,7 @@ glance_cors_allowed_origin: "{{ (glance_show_multiple_locations | bool) | ternar
## Cap the maximum number of threads / workers when a user value is unspecified.
glance_api_threads_max: 16
glance_api_threads: "{{ [[ansible_processor_vcpus|default(2) // 2, 1] | max, glance_api_threads_max] | min }}"
glance_api_threads: "{{ [[(ansible_processor_vcpus//ansible_processor_threads_per_core)|default(1), 1] | max, glance_api_threads_max] | min }}"
glance_task_executor: taskflow
glance_digest_algorithm: sha256
@ -276,7 +276,7 @@ glance_services:
# Glance uWSGI settings
glance_wsgi_processes_max: 16
glance_wsgi_processes: "{{ [[ansible_processor_vcpus|default(1), 1] | max * 2, glance_wsgi_processes_max] | min }}"
glance_wsgi_processes: "{{ [[(ansible_processor_vcpus//ansible_processor_threads_per_core)|default(1), 1] | max * 2, glance_wsgi_processes_max] | min }}"
glance_wsgi_threads: 1
## Tunable overrides