Neutron performance Ocata

Sa Pham saphi070 at gmail.com
Fri Dec 14 00:08:45 UTC 2018


Hi,
I saw it. In recently release, Neutron is too slow

Sa Pham Dang
Cloud RnD Team - VCCLOUD
Phone: 0986849582
Skype: great_bn

> On Dec 14, 2018, at 12:38 AM, Matteo Dacrema <mdacrema at enter.eu> wrote:
> 
> Hi all, 
> 
> I’ve recently upgraded Openstack from Mitaka to Ocata and now I’m facing an increased latency in instance creation.
> Before the upgrade I was able to launch sequentially 400 VMs in 5 minutes and now I need at least 15 minutes. Attached the script I use to measure timings.
> 
> Here you can find the comparison between Mitaka and Ocata. I also noticed that in Ocata DHCP agent is slower and sometimes when I launch more than 30 VMs sequentially some of them doesn’t took an address.
> Time of instance creation increase with the number of ports in the network. 
> 
> https://docs.google.com/spreadsheets/d/1eHjRxkw_5BmJ2p0rBJg9suGKmu_1YrSY05f50gKJxbE/edit?usp=sharing
> 
> I’ve enabled the osprofiler inside nova and neutron api and attached you can see that the most of the time is spent on wsgi component of neutron.
> The time is spent on getting port list. I’ve also verified with cli listing only ports and I can confirm is a port list related issue.
> 
> I’m trying to profile the neutron-server with cProfile but I’ve some problems with multi-threading tracing.
> 
> Does anyone have faced this issue?  
> 
> Thank you!
> 
> Regards
> Matteo
> 
> <profiler9.html>
> <launch.py>
> 
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