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[Bug 1835663] [NEW] Some L3 RPCs are time-consuming especially get_routers

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: LIU Yulong <yulong@xxxxxxxxxxxxx>
Date: Sun, 07 Jul 2019 15:42:59 -0000
Reply-to: Bug 1835663 <1835663@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Public bug reported:

Examples:
http://logs.openstack.org/11/669111/4/check/neutron-tempest-plugin-dvr-multinode-scenario/dc3af26/controller/logs/screen-q-l3.txt.gz#_Jul_07_04_18_11_791730
http://logs.openstack.org/11/669111/4/check/neutron-tempest-plugin-dvr-multinode-scenario/dc3af26/controller/logs/screen-q-l3.txt.gz#_Jul_07_04_18_45_507205
http://logs.openstack.org/11/669111/4/check/neutron-tempest-plugin-dvr-multinode-scenario/dc3af26/controller/logs/screen-q-l3.txt.gz#_Jul_07_04_20_04_023626
http://logs.openstack.org/11/669111/4/check/neutron-tempest-plugin-dvr-multinode-scenario/dc3af26/controller/logs/screen-q-l3.txt.gz#_Jul_07_04_20_34_698863

Some possible reasons:
1. neutron server is busy while it can not process this RPC
2. DB slow query
3. L3 agent thread (context) switching

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1835663

Title:
  Some L3 RPCs are time-consuming especially get_routers

Status in neutron:
  New

Bug description:
  Examples:
  http://logs.openstack.org/11/669111/4/check/neutron-tempest-plugin-dvr-multinode-scenario/dc3af26/controller/logs/screen-q-l3.txt.gz#_Jul_07_04_18_11_791730
  http://logs.openstack.org/11/669111/4/check/neutron-tempest-plugin-dvr-multinode-scenario/dc3af26/controller/logs/screen-q-l3.txt.gz#_Jul_07_04_18_45_507205
  http://logs.openstack.org/11/669111/4/check/neutron-tempest-plugin-dvr-multinode-scenario/dc3af26/controller/logs/screen-q-l3.txt.gz#_Jul_07_04_20_04_023626
  http://logs.openstack.org/11/669111/4/check/neutron-tempest-plugin-dvr-multinode-scenario/dc3af26/controller/logs/screen-q-l3.txt.gz#_Jul_07_04_20_34_698863

  Some possible reasons:
  1. neutron server is busy while it can not process this RPC
  2. DB slow query
  3. L3 agent thread (context) switching

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