max_pool_size is not set in neutron.conf

[Ivan Berezovskiy]

steps to reproduce:
Deploy environment: 3 controller, 3 ceph node, any number on compute nodes
Check neutron.conf (database section) on any controller node:

expected result:
max_pool_size is set and calculated according to formula min($::processorcount * 5 + 0, 30 + 0)

actual result:
#max_pool_size = <None>

This parameter is very important for performance and it has to be set

ISO https://product-ci.infra.mirantis.net/job/9.0.all/121/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/302771

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/302771
Committed: https://git.openstack.org/cgit/openstack/fuel-library/commit/?id=a21f8a650fb4a755ce16e56f0099493f0ee113bb
Submitter: Jenkins
Branch: master

commit a21f8a650fb4a755ce16e56f0099493f0ee113bb
Author: Sergey Kolekonov <email address hidden>
Date: Thu Apr 7 16:42:06 2016 +0300

    Align db parameters for Neutron with global values

    Set the following values according to global values:
    - database_max_retries
    - database_idle_timeout
    - database_max_pool_size
    - database_max_overflow

    Change-Id: I7c914e8fb8dff1335229134c3dd65aa0109a147c
    Closes-bug: #1566797

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/mitaka
Review: https://review.openstack.org/304197

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/304197
Committed: https://git.openstack.org/cgit/openstack/fuel-library/commit/?id=d6ecdb947b33bcba03d62b59c111cfdb10d2de49
Submitter: Jenkins
Branch: stable/mitaka

commit d6ecdb947b33bcba03d62b59c111cfdb10d2de49
Author: Sergey Kolekonov <email address hidden>
Date: Thu Apr 7 16:42:06 2016 +0300

    Align db parameters for Neutron with global values

    Set the following values according to global values:
    - database_max_retries
    - database_idle_timeout
    - database_max_pool_size
    - database_max_overflow

    Change-Id: I7c914e8fb8dff1335229134c3dd65aa0109a147c
    Closes-bug: #1566797
    (cherry picked from commit a21f8a650fb4a755ce16e56f0099493f0ee113bb)

[Kristina Berezovskaia (kkuznetsova)]

Verify on:
[root@nailgun ~]# shotgun2 short-report
cat /etc/fuel_build_id:
 195
cat /etc/fuel_build_number:
 195
cat /etc/fuel_release:
 9.0
cat /etc/fuel_openstack_version:
 mitaka-9.0
rpm -qa | egrep 'fuel|astute|network-checker|nailgun|packetary|shotgun':
 fuel-release-9.0.0-1.mos6332.noarch
 fuel-misc-9.0.0-1.mos8290.noarch
 python-packetary-9.0.0-1.mos131.noarch
 fuel-openstack-metadata-9.0.0-1.mos8648.noarch
 fuel-provisioning-scripts-9.0.0-1.mos8648.noarch
 python-fuelclient-9.0.0-1.mos306.noarch
 fuel-9.0.0-1.mos6332.noarch
 fuel-nailgun-9.0.0-1.mos8648.noarch
 rubygem-astute-9.0.0-1.mos738.noarch
 fuel-library9.0-9.0.0-1.mos8290.noarch
 fuel-agent-9.0.0-1.mos272.noarch
 fuel-ui-9.0.0-1.mos2658.noarch
 fuel-setup-9.0.0-1.mos6332.noarch
 nailgun-mcagents-9.0.0-1.mos738.noarch
 shotgun-9.0.0-1.mos87.noarch
 network-checker-9.0.0-1.mos72.x86_64
 fuel-bootstrap-cli-9.0.0-1.mos272.noarch
 fuel-migrate-9.0.0-1.mos8290.noarch
 fuelmenu-9.0.0-1.mos268.noarch
 fuel-notify-9.0.0-1.mos8290.noarch
 fuel-ostf-9.0.0-1.mos924.noarch
 fuel-mirror-9.0.0-1.mos131.noarch
 fuel-utils-9.0.0-1.mos8290.noarch

In neutron.conf max_pool_size is equil = 20
(processorcount = 4 in my case)