Cap the number of worker threads
Users can configure the number of worker threads however when it's not specified the calculated number of workers can get too large on hosts with a large number of CPUs. Change-Id: I01af5ef83698231137b972b9a6d504d6f99eabaf
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@ -411,6 +411,10 @@ neutron_quota_vip: 10
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# If ``neutron_metadata_workers`` is unset the system will use half the number of available VCPUs to
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# compute the number of api workers to use.
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# neutron_metadata_workers: 16
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## Cap the maximun number of threads / workers when a user value is unspecified.
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neutron_api_threads_max: 16
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neutron_metadata_backlog: 4096
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## Auth
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6
releasenotes/notes/cap-workers-fc70b4f8586ba1a5.yaml
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releasenotes/notes/cap-workers-fc70b4f8586ba1a5.yaml
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@ -0,0 +1,6 @@
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---
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features:
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- The number of worker threads for neutron will now be capped at 16 unless
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a specific value is specified. Previously, the calculated number of workers
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could get too high on systems with a large number of processors. This was
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particularly evident on POWER systems.
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@ -1,6 +1,6 @@
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# {{ ansible_managed }}
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{% set _api_threads = ansible_processor_vcpus|default(2) // 2 %}
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{% set _api_threads = [ansible_processor_vcpus|default(2) // 2, neutron_api_threads_max] | min %}
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{% set api_threads = _api_threads if _api_threads > 0 else 1 %}
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# General, applies to all host groups
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