--- /dev/null
+From 15284786b55e844fcdcc95d5865c91be03871487 Mon Sep 17 00:00:00 2001
+From: Bogdan Dobrelya <bdobrelia@mirantis.com>
+Date: Fri, 30 Sep 2016 12:03:34 +0200
+Subject: [PATCH] Rework processorcount limits to os_workers
+
+* reduce workers_max default limits of a 16 to the $::os_workers, which is limited by [2, 8] interval.
+* reduce workers/pool size/overflow limited by F($::processorcount) to F($::os_workers)
+
+Closes-bug: 1629238
+
+Change-Id: I5cc4d70b902eeaa1c9cf42911606eba13dd84aa2
+Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
+
+diff --git a/deployment/puppet/openstack/manifests/cinder.pp b/deployment/puppet/openstack/manifests/cinder.pp
+index 36747a61e..502bc94b8 100644
+--- a/deployment/puppet/openstack/manifests/cinder.pp
++++ b/deployment/puppet/openstack/manifests/cinder.pp
+@@ -44,7 +44,7 @@ class openstack::cinder(
+ $keystone_user = 'cinder',
+ $region = 'RegionOne',
+ $notification_driver = undef,
+- $service_workers = $::processorcount,
++ $service_workers = $::os_workers,
+ $vmware_host_ip = '10.10.10.10',
+ $vmware_host_username = 'administrator@vsphere.local',
+ $vmware_host_password = 'password',
+diff --git a/deployment/puppet/openstack_tasks/manifests/ceilometer/controller.pp b/deployment/puppet/openstack_tasks/manifests/ceilometer/controller.pp
+index 72fbe3271..e6fcf4f88 100644
+--- a/deployment/puppet/openstack_tasks/manifests/ceilometer/controller.pp
++++ b/deployment/puppet/openstack_tasks/manifests/ceilometer/controller.pp
+@@ -35,7 +35,7 @@ class openstack_tasks::ceilometer::controller {
+ $service_endpoint = hiera('service_endpoint', $management_vip)
+ $ha_mode = pick($ceilometer_hash['ha_mode'], true)
+ $ssl_hash = hiera_hash('use_ssl', {})
+- $workers_max = hiera('workers_max', 16)
++ $workers_max = hiera('workers_max', $::os_workers)
+ $service_workers = pick($ceilometer_hash['workers'],
+ min(max($::processorcount, 2), $workers_max))
+
+diff --git a/deployment/puppet/openstack_tasks/manifests/glance/glance.pp b/deployment/puppet/openstack_tasks/manifests/glance/glance.pp
+index 4c951999d..f3a20c5a7 100644
+--- a/deployment/puppet/openstack_tasks/manifests/glance/glance.pp
++++ b/deployment/puppet/openstack_tasks/manifests/glance/glance.pp
+@@ -21,7 +21,7 @@ class openstack_tasks::glance::glance {
+ $max_overflow = hiera('max_overflow')
+ $ceilometer_hash = hiera_hash('ceilometer', {})
+ $region = hiera('region','RegionOne')
+- $workers_max = hiera('workers_max', 16)
++ $workers_max = hiera('workers_max', $::os_workers)
+ $service_workers = pick($glance_hash['glance_workers'],
+ min(max($::processorcount, 2), $workers_max))
+ $ironic_hash = hiera_hash('ironic', {})
+diff --git a/deployment/puppet/openstack_tasks/manifests/horizon/horizon.pp b/deployment/puppet/openstack_tasks/manifests/horizon/horizon.pp
+index 1a70af711..824c700bb 100644
+--- a/deployment/puppet/openstack_tasks/manifests/horizon/horizon.pp
++++ b/deployment/puppet/openstack_tasks/manifests/horizon/horizon.pp
+@@ -134,7 +134,7 @@ class openstack_tasks::horizon::horizon {
+ $wsgi_processes = 2
+ $wsgi_threads = 9
+ } else {
+- $wsgi_processes = $::processorcount
++ $wsgi_processes = $::os_workers
+ $wsgi_threads = 15
+ }
+
+diff --git a/deployment/puppet/openstack_tasks/manifests/ironic/ironic_compute.pp b/deployment/puppet/openstack_tasks/manifests/ironic/ironic_compute.pp
+index 2d26e1f19..6e7d8ca2b 100644
+--- a/deployment/puppet/openstack_tasks/manifests/ironic/ironic_compute.pp
++++ b/deployment/puppet/openstack_tasks/manifests/ironic/ironic_compute.pp
+@@ -35,8 +35,8 @@ class openstack_tasks::ironic::ironic_compute {
+ $db_name = pick($nova_hash['db_name'], 'nova')
+ $db_password = pick($nova_hash['db_password'], 'nova')
+
+- $max_pool_size = hiera('max_pool_size', min($::processorcount * 5 + 0, 30 + 0))
+- $max_overflow = hiera('max_overflow', min($::processorcount * 5 + 0, 60 + 0))
++ $max_pool_size = hiera('max_pool_size', min($::os_workers * 5 + 0, 30 + 0))
++ $max_overflow = hiera('max_overflow', min($::os_workers * 5 + 0, 60 + 0))
+ $idle_timeout = hiera('idle_timeout', '3600')
+ $max_retries = hiera('max_retries', '-1')
+
+diff --git a/deployment/puppet/openstack_tasks/manifests/keystone/keystone.pp b/deployment/puppet/openstack_tasks/manifests/keystone/keystone.pp
+index 0d96b177a..0d3d33bff 100644
+--- a/deployment/puppet/openstack_tasks/manifests/keystone/keystone.pp
++++ b/deployment/puppet/openstack_tasks/manifests/keystone/keystone.pp
+@@ -22,7 +22,7 @@ class openstack_tasks::keystone::keystone {
+ $syslog_log_facility = hiera('syslog_log_facility_keystone')
+ $rabbit_hash = hiera_hash('rabbit', {})
+ $neutron_user_password = hiera('neutron_user_password', false)
+- $workers_max = hiera('workers_max', 16)
++ $workers_max = hiera('workers_max', $::os_workers)
+ $service_workers = pick($keystone_hash['workers'],
+ min(max($::processorcount, 2), $workers_max))
+ $default_log_levels = hiera_hash('default_log_levels')
+diff --git a/deployment/puppet/openstack_tasks/manifests/openstack_cinder/openstack_cinder.pp b/deployment/puppet/openstack_tasks/manifests/openstack_cinder/openstack_cinder.pp
+index 6eccfc37b..644dd2440 100644
+--- a/deployment/puppet/openstack_tasks/manifests/openstack_cinder/openstack_cinder.pp
++++ b/deployment/puppet/openstack_tasks/manifests/openstack_cinder/openstack_cinder.pp
+@@ -13,7 +13,7 @@ class openstack_tasks::openstack_cinder::openstack_cinder {
+ $sahara_hash = hiera_hash('sahara', {})
+ $rabbit_hash = hiera_hash('rabbit', {})
+ $service_endpoint = hiera('service_endpoint')
+- $workers_max = hiera('workers_max', 16)
++ $workers_max = hiera('workers_max', $::os_workers)
+ $service_workers = pick($cinder_hash['workers'], min(max($::processorcount, 2), $workers_max))
+ $cinder_user_password = $cinder_hash[user_password]
+ $keystone_user = pick($cinder_hash['user'], 'cinder')
+@@ -84,8 +84,8 @@ class openstack_tasks::openstack_cinder::openstack_cinder {
+ }
+
+ # SQLAlchemy backend configuration
+- $max_pool_size = min($::processorcount * 5 + 0, 30 + 0)
+- $max_overflow = min($::processorcount * 5 + 0, 60 + 0)
++ $max_pool_size = min($::os_workers * 5 + 0, 30 + 0)
++ $max_overflow = min($::os_workers * 5 + 0, 60 + 0)
+ $max_retries = '-1'
+ $idle_timeout = '3600'
+
+diff --git a/deployment/puppet/openstack_tasks/manifests/openstack_controller/openstack_controller.pp b/deployment/puppet/openstack_tasks/manifests/openstack_controller/openstack_controller.pp
+index 458c34c8f..89fcb20b3 100644
+--- a/deployment/puppet/openstack_tasks/manifests/openstack_controller/openstack_controller.pp
++++ b/deployment/puppet/openstack_tasks/manifests/openstack_controller/openstack_controller.pp
+@@ -48,7 +48,7 @@ class openstack_tasks::openstack_controller::openstack_controller {
+ $keystone_user = pick($nova_hash['user'], 'nova')
+ $keystone_tenant = pick($nova_hash['tenant'], 'services')
+ $region_name = hiera('region', 'RegionOne')
+- $workers_max = hiera('workers_max', 16)
++ $workers_max = hiera('workers_max', $::os_workers)
+ $service_workers = pick($nova_hash['workers'],
+ min(max($::processorcount, 2), $workers_max))
+ $compute_nodes = get_nodes_hash_by_roles($network_metadata, ['compute'])
+@@ -117,8 +117,8 @@ class openstack_tasks::openstack_controller::openstack_controller {
+ })
+
+ # SQLAlchemy backend configuration
+- $max_pool_size = hiera('max_pool_size', min($::processorcount * 5 + 0, 30 + 0))
+- $max_overflow = hiera('max_overflow', min($::processorcount * 5 + 0, 60 + 0))
++ $max_pool_size = hiera('max_pool_size', min($::os_workers * 5 + 0, 30 + 0))
++ $max_overflow = hiera('max_overflow', min($::os_workers * 5 + 0, 60 + 0))
+ $idle_timeout = hiera('idle_timeout', '3600')
+ $max_retries = hiera('max_retries', '-1')
+
+diff --git a/deployment/puppet/openstack_tasks/manifests/openstack_network/agents/metadata.pp b/deployment/puppet/openstack_tasks/manifests/openstack_network/agents/metadata.pp
+index 9492493d1..240a378b7 100644
+--- a/deployment/puppet/openstack_tasks/manifests/openstack_network/agents/metadata.pp
++++ b/deployment/puppet/openstack_tasks/manifests/openstack_network/agents/metadata.pp
+@@ -9,7 +9,7 @@ class openstack_tasks::openstack_network::agents::metadata {
+ $neutron_advanced_config = hiera_hash('neutron_advanced_configuration', { })
+ $neutron_config = hiera_hash('neutron_config')
+ $dvr = pick($neutron_advanced_config['neutron_dvr'], false)
+- $workers_max = hiera('workers_max', 16)
++ $workers_max = hiera('workers_max', $::os_workers)
+
+ if $compute {
+ $metadata_workers = pick($neutron_config['workers'],
+diff --git a/deployment/puppet/openstack_tasks/manifests/openstack_network/server_config.pp b/deployment/puppet/openstack_tasks/manifests/openstack_network/server_config.pp
+index 1d5c2d0e1..822e41750 100644
+--- a/deployment/puppet/openstack_tasks/manifests/openstack_network/server_config.pp
++++ b/deployment/puppet/openstack_tasks/manifests/openstack_network/server_config.pp
+@@ -64,7 +64,7 @@ class openstack_tasks::openstack_network::server_config {
+ $auth_url = "${internal_auth_protocol}://${internal_auth_endpoint}:35357/"
+ $nova_admin_auth_url = "${admin_auth_protocol}://${admin_auth_endpoint}:35357/"
+
+- $workers_max = hiera('workers_max', 16)
++ $workers_max = hiera('workers_max', $::os_workers)
+ $service_workers = pick($neutron_config['workers'], min(max($::processorcount, 1), $workers_max))
+
+ $neutron_advanced_config = hiera_hash('neutron_advanced_configuration', { })
+diff --git a/deployment/puppet/openstack_tasks/manifests/roles/cinder.pp b/deployment/puppet/openstack_tasks/manifests/roles/cinder.pp
+index b36619437..b6958b64f 100644
+--- a/deployment/puppet/openstack_tasks/manifests/roles/cinder.pp
++++ b/deployment/puppet/openstack_tasks/manifests/roles/cinder.pp
+@@ -81,8 +81,8 @@ class openstack_tasks::roles::cinder {
+ }
+
+ # SQLAlchemy backend configuration
+- $max_pool_size = min($::processorcount * 5 + 0, 30 + 0)
+- $max_overflow = min($::processorcount * 5 + 0, 60 + 0)
++ $max_pool_size = min($::os_workers * 5 + 0, 30 + 0)
++ $max_overflow = min($::os_workers * 5 + 0, 60 + 0)
+ $max_retries = '-1'
+ $idle_timeout = '3600'
+
+diff --git a/deployment/puppet/openstack_tasks/manifests/sahara/sahara.pp b/deployment/puppet/openstack_tasks/manifests/sahara/sahara.pp
+index 9d011ceb5..0366659f0 100644
+--- a/deployment/puppet/openstack_tasks/manifests/sahara/sahara.pp
++++ b/deployment/puppet/openstack_tasks/manifests/sahara/sahara.pp
+@@ -51,8 +51,8 @@ class openstack_tasks::sahara::sahara {
+ $sahara_user = pick($sahara_hash['user'], 'sahara')
+ $sahara_password = pick($sahara_hash['user_password'])
+ $tenant = pick($sahara_hash['tenant'], 'services')
+- $max_pool_size = min($::processorcount * 5 + 0, 30 + 0)
+- $max_overflow = min($::processorcount * 5 + 0, 60 + 0)
++ $max_pool_size = min($::os_workers * 5 + 0, 30 + 0)
++ $max_overflow = min($::os_workers * 5 + 0, 60 + 0)
+ $max_retries = '-1'
+ $idle_timeout = '3600'
+
+diff --git a/deployment/puppet/openstack_tasks/manifests/swift/parts/proxy.pp b/deployment/puppet/openstack_tasks/manifests/swift/parts/proxy.pp
+index 81d64a2d8..8a68acdb3 100644
+--- a/deployment/puppet/openstack_tasks/manifests/swift/parts/proxy.pp
++++ b/deployment/puppet/openstack_tasks/manifests/swift/parts/proxy.pp
+@@ -26,7 +26,7 @@ class openstack_tasks::swift::parts::proxy (
+ 'account_quotas',
+ 'slo',
+ 'proxy-server'],
+- $proxy_workers = $::processorcount,
++ $proxy_workers = $::os_workers,
+ $proxy_port = '8080',
+ $proxy_allow_account_management = true,
+ $proxy_account_autocreate = true,
+diff --git a/deployment/puppet/openstack_tasks/manifests/swift/proxy_storage.pp b/deployment/puppet/openstack_tasks/manifests/swift/proxy_storage.pp
+index a221baf36..77f4ba1a0 100644
+--- a/deployment/puppet/openstack_tasks/manifests/swift/proxy_storage.pp
++++ b/deployment/puppet/openstack_tasks/manifests/swift/proxy_storage.pp
+@@ -30,7 +30,7 @@ class openstack_tasks::swift::proxy_storage {
+ $keystone_user = pick($swift_hash['user'], 'swift')
+ $keystone_password = pick($swift_hash['user_password'], 'passsword')
+ $keystone_tenant = pick($swift_hash['tenant'], 'services')
+- $workers_max = hiera('workers_max', 16)
++ $workers_max = hiera('workers_max', $::os_workers)
+ $service_workers = pick($swift_hash['workers'], min(max($::processorcount, 2), $workers_max))
+ $ssl_hash = hiera_hash('use_ssl', {})
+ $rabbit_hash = hiera_hash('rabbit')
+diff --git a/deployment/puppet/osnailyfacter/lib/facter/os_workers.rb b/deployment/puppet/osnailyfacter/lib/facter/os_workers.rb
+new file mode 100644
+index 000000000..404fb9018
+--- /dev/null
++++ b/deployment/puppet/osnailyfacter/lib/facter/os_workers.rb
+@@ -0,0 +1,20 @@
++#
++# We've found that using $::processorcount for workers/threads can lead to
++# unexpected memory or process counts for people deploying on baremetal or
++# if they have large number of cpus. This fact allows us to tweak the formula
++# used to determine number of workers in a single place but use it across all
++# modules.
++#
++# The value for os_workers is max between '(<# processors> / 4)' and '2' with
++# a cap of 8.
++#
++# This fact can be overloaded by an external fact from /etc/factor/facts.d if
++# a user would like to provide their own default value.
++#
++Facter.add(:os_workers) do
++ has_weight 100
++ setcode do
++ processors = Facter.value('processorcount')
++ [ [ (processors.to_i / 4), 2 ].max, 8 ].min
++ end
++end
+diff --git a/deployment/puppet/osnailyfacter/manifests/apache_mpm.pp b/deployment/puppet/osnailyfacter/manifests/apache_mpm.pp
+index 51bc3274d..70a654ae2 100644
+--- a/deployment/puppet/osnailyfacter/manifests/apache_mpm.pp
++++ b/deployment/puppet/osnailyfacter/manifests/apache_mpm.pp
+@@ -11,7 +11,7 @@ class osnailyfacter::apache_mpm inherits ::osnailyfacter::apache {
+ if ($::processorcount + 0) <= 2 {
+ $startservers = 2
+ } else {
+- $startservers = $::processorcount
++ $startservers = $::os_workers
+ }
+
+ $maxrequestsperchild = 0
+diff --git a/deployment/puppet/osnailyfacter/manifests/globals/globals.pp b/deployment/puppet/osnailyfacter/manifests/globals/globals.pp
+index 99e0fa4cd..2e38b10ee 100644
+--- a/deployment/puppet/osnailyfacter/manifests/globals/globals.pp
++++ b/deployment/puppet/osnailyfacter/manifests/globals/globals.pp
+@@ -311,14 +311,14 @@ class osnailyfacter::globals::globals {
+ # The default value assumes there are 20 different types of workers limited by 100Mb each.
+ $workers_ratio = hiera('workers_ratio', 2000)
+ # Defines the maximum allowed number of workers for each service by RAM limits. Cannot exceed the value of 30.
+- $workers_max = inline_template("<%= [(@memorysize_mb.to_i / @workers_ratio.to_i).floor + 1, 30].min %>")
++ $workers_max = inline_template("<%= [(@memorysize_mb.to_i / @workers_ratio.to_i).floor + 1, $::os_workers].min %>")
+
+ $node_name_prefix_for_messaging = hiera('node_name_prefix_for_messaging', 'messaging-')
+
+ # MySQL and SQLAlchemy backend configuration
+ $custom_mysql_setup_class = hiera('custom_mysql_setup_class', 'galera')
+- $max_pool_size = hiera('max_pool_size', min($::processorcount * 5 + 0, 30 + 0))
+- $max_overflow = hiera('max_overflow', min($::processorcount * 5 + 0, 60 + 0))
++ $max_pool_size = hiera('max_pool_size', min($::os_workers * 5 + 0, 30 + 0))
++ $max_overflow = hiera('max_overflow', min($::os_workers * 5 + 0, 60 + 0))
+ $max_retries = hiera('max_retries', '-1')
+ $idle_timeout = hiera('idle_timeout','3600')
+ $nova_db_password = $nova_hash['db_password']
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