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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Kai-<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Looking at the code the 60 second interval is hard coded and not changeable via a config parameter.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Having said that, and given that it’s a fairly expensive operation to update the DB for `every` compute node in the system, maybe the better question is why
do you want to increase the update frequency? Do you really expect to be creating/deleting instances so fast on a single node that a 60 second latency in the update of the stats is really a problem?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">--<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Don Dugger<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">"Censeo Toto nos in Kansa esse decisse." - D. Gale<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Ph: 303/443-3786<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> Kai Brennenstuhl [mailto:kai.brennenstuhl@gmail.com]
<br>
<b>Sent:</b> Thursday, June 26, 2014 6:56 AM<br>
<b>To:</b> openstack@lists.openstack.org<br>
<b>Subject:</b> [Openstack] [openstack][nova] Compute node update interval<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi,<br>
<br>
how can I specify the interval in which the (free) resources of my compute nodes are updated and written into the DB?<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I looked into nova.conf doc and already changed the following attributes:<o:p></o:p></p>
<pre><code>heal_instance_info_cache_interval = 20<o:p></o:p></code></pre>
<pre><code>service_down_time = 20<o:p></o:p></code></pre>
<pre><code>periodic_fuzzy_delay = 20<o:p></o:p></code></pre>
<pre><code>qpid_heartbeat = 20<o:p></o:p></code></pre>
<pre><code>scheduler_driver_task_period = 20<o:p></o:p></code></pre>
<pre><code><o:p> </o:p></code></pre>
<pre><code>call_timeout = 20<o:p></o:p></code></pre>
<pre><code>db_check_interval = 20</code><o:p></o:p></pre>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">But the update interval in which the resources are written into the database still is about one minute.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Which parameters should I change? Or is this configuration done somewhere else than in nova.conf?<br>
<br>
<o:p></o:p></p>
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<p class="MsoNormal">Kind regards<br>
Kai<o:p></o:p></p>
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