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[Boden R <bodenvmw@xxxxxxxxx>]

As noted in the commit message, this introduces a new config option that
needs to be doc'd in the manuals; moving to openstack-manuals.

Note this is for newton; there's a separate bug for master.

** Changed in: neutron
       Status: Triaged => New

** Changed in: neutron
   Importance: Low => Undecided

** Project changed: neutron => openstack-manuals

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https://bugs.launchpad.net/bugs/1631384

Title:
      New option for num_threads for state change server

Status in openstack-manuals:
  New

Bug description:
  https://review.openstack.org/379578
  Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.
  Your project "openstack/neutron" is set up so that we directly report the documentation bugs against it. If this needs changing, the docimpact-group option needs to be added for the project. You can ask the OpenStack infra team (#openstack-infra on freenode) for help if you need to.

  commit 5c1516e1fb07bb3e026a3569396567c3907b31c6
  Author: venkata anil <anilvenkata@xxxxxxxxxx>
  Date:   Tue May 17 16:30:13 2016 +0000

      New option for num_threads for state change server
      
      Currently max number of client connections(i.e greenlets spawned at
      a time) opened at any time by the WSGI server is set to 100 with
      wsgi_default_pool_size[1].
      
      This configuration may be fine for neutron api server. But with
      wsgi_default_pool_size(=100) requests, state change server
      is creating heavy cpu load on agent.
      So this server(which run on agents) need lesser value i.e
      can be configured to half the number of cpu on agent
      
      We use "ha_keepalived_state_change_server_threads" config option
      to configure number of threads in state change server instead of
      wsgi_default_pool_size.
      
      [1] https://review.openstack.org/#/c/278007/
      
      DocImpact: Add new config option -
      ha_keepalived_state_change_server_threads, to configure number
      of threads in state change server.
      
      Closes-Bug: #1581580
      Change-Id: I822ea3844792a7731fd24419b7e90e5aef141993
      (cherry picked from commit 70ea188f5d87c45fb60ace8b8405274e5f6dd489)

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