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<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am looking to improve the database load distribution and one of the things that may help with this is to spread out the reads.<o:p></o:p></p>
<p class="MsoNormal">From the configuration reference it looks like neutron dues support a slave_connection parameter but when I enabled it and enabled query logging on the secondary databases there aren’t any queries being executed on the secondaries. Is there
anything I am missing ?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sorry for CC’ing the dev list as well but someone in the dev teams may have an answer from a developer point of view.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My setup is like this:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Openstack stable/mitaka (built from git)<o:p></o:p></p>
<p class="MsoNormal">3 galera nodes<o:p></o:p></p>
<p class="MsoNormal">1 haproxy running on each node with active/backup with local node as single active configuration for the frontend listening on :3306 and active/backup with the other nodes as active for the frontend listening on :3308<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In neutron.conf in the [database] section I set up the the connection and slave_connection parameters like this:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">[database]<o:p></o:p></p>
<p class="MsoNormal">connection = mysql+pymysql://neutron:XXXXXXX@neutron-db.service:3306/neutron?charset=utf8<o:p></o:p></p>
<p class="MsoNormal">slave_connection = mysql+pymysql://neutron: XXXXXXX@neutron-db.service:3308/neutron?charset=utf8<o:p></o:p></p>
<p class="MsoNormal">idle_timeout = 1800<o:p></o:p></p>
<p class="MsoNormal">max_retries = -1<o:p></o:p></p>
<p class="MsoNormal">retry_interval = 5<o:p></o:p></p>
<p class="MsoNormal">min_pool_size = 8<o:p></o:p></p>
<p class="MsoNormal">max_pool_size = 32<o:p></o:p></p>
<p class="MsoNormal">max_overflow = 16<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Loooking on a slave it opens a single connection which is eventually closed because of lack of activity.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><br>
Thanks,<o:p></o:p></p>
<p class="MsoNormal">Cristian<o:p></o:p></p>
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