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<div class="moz-cite-prefix">Hello, <br>
<br>
i use MySQL as Database. I query Opennebula from python via
pyoca[1]. But i registered the same effect using the command
"onevm list". <br>
<br>
The effect depend also on the number of running VMs, but i run
only at maximum 30 VMs. The effect starts at round about 6 VMs.
Usually the time increases to round about one or two seconds. But
suddenly it response very slow >>>60 seconds or didn't
answer. <br>
<br>
Also the creation of a new VM getting stucked (response time also
increases to over 60 seconds). <br>
<br>
Sometimes the time increases to round about 240 seconds for one
call. Then the next call takes about one or two seconds. <br>
<br>
I couldn't see an xml-rpc request in the oned.log because my gui
wait until the last xml-rpc request is finished.<br>
<br>
I profile every part of my code with time measurements and traced
it down to the xml-rpc requests to opennebula.<br>
<br>
Hope this help.<br>
<br>
Regards, <br>
<br>
Christoph Robbert<br>
<br>
<br>
<br>
[1]
<meta http-equiv="content-type" content="text/html;
charset=ISO-8859-1">
<a href="https://github.com/lukaszo/python-oca">
https://github.com/lukaszo/python-oca</a><br>
<br>
<br>
<br>
Am 04.09.2012 12:59, schrieb Carlos Martín Sánchez:<br>
</div>
<blockquote
cite="mid:CAEPYvFLurtrMj_LaMLq05kau7W+7xKd78rZJU8PfgQwB7DrY=A@mail.gmail.com"
type="cite">Hi,
<div><br>
</div>
<div>Can you share some more information about your scenario? Are
you using sqlite, or mysql? MySQL can drastically improve the
performance over sqlite.</div>
<div><br>
</div>
<div>How are you querying OpenNebula, are you using the CLI, our
ruby/java OCA? The response time can be affected by the xml
processing that the OCA has to do. If you are using Ruby, it is
crucial that you have the nokogiri gem installed</div>
<div><br>
</div>
<div>Does the response time increase always over time, or is it
related to the number of existing VMs? If so, how many VMs does
it take to make it irresponsive?</div>
<div><br>
</div>
<div>Can you still see the xml-rpc requests in oned.log each
second?</div>
<div><br>
</div>
<div>I'm trying to reproduce the problem, having over a 1000
running VMs. I'm doing a onevm create & shutdown every 5
seconds while checking the time it takes to do a onevm list each
second, but can't see any response taking more than one or two
seconds.</div>
<div><br>
</div>
<div>Regards<br clear="all">
--<br>
Carlos Martín, MSc<br>
Project Engineer<br>
OpenNebula - The Open-source Solution for Data Center
Virtualization
<div><span
style="border-collapse:collapse;color:rgb(136,136,136);font-family:arial,sans-serif;font-size:13px"><a
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target="_blank">www.OpenNebula.org</a> | <a
moz-do-not-send="true"
href="mailto:cmartin@opennebula.org" target="_blank">cmartin@opennebula.org</a>
| <a moz-do-not-send="true"
href="http://twitter.com/opennebula" target="_blank">@OpenNebula</a></span><span
style="border-collapse:collapse;color:rgb(136,136,136);font-family:arial,sans-serif;font-size:13px"></span></div>
<br>
<br>
<br>
<div class="gmail_quote">On Tue, Aug 28, 2012 at 1:40 PM,
Christoph Robbert <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:chrobbert@googlemail.com" target="_blank">chrobbert@googlemail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello,<br>
<br>
I'm working on project with Opennebula 3.6 as
cloudcontroller. We start and stop VMs via xml-rpc nearly
every 15 seconds. To monitor the actions in realtime, i
implemented a gui, which calls Opennebula every second via
xml-rpc. Now i notice a real big increase of the response
time after 10 minutes. The response time increases from
nearly 1 second to 5 Minutes. Some time i have to restart
Opennebula because the response time increase to infinity.<br>
Could you give me a hind where i should start to trace the
bottleneck in Opennebula?<br>
<br>
<br>
Best Regards,<br>
<br>
Christoph Robbert<br>
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</blockquote>
</div>
<br>
</div>
</blockquote>
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