pulpito slowness

pulpito slowness

[Loic Dachary]

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Hi Alfredo,

After installing pulpito and run from sources with:

        virtualenv ./virtualenv
        source ./virtualenv/bin/activate
        pip install -r requirements.txt
        python run.py &

I run a rados suite with 40 workers and 218 jobs. All is well except a slowness from pulpito that I don't quite understand. It takes 9 seconds to load although the load average of the machine is low, the CPU are not all busy, there is plenty of free ram.

ubuntu@teuthology:~$ curl http://localhost:8081/ubuntu-2015-07-19_15:57:13-rados-hammer---basic-openstack/ > /dev/null  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  391k  100  391k    0     0  42774      0  0:00:09  0:00:09 --:--:-- 96305

Do you have an idea of the reason for this slowness ? 

Cheers

-- 
Loïc Dachary, Artisan Logiciel Libre


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Re: pulpito slowness

[Alfredo Deza]

----- Original Message -----
> From: "Loic Dachary" <loic@dachary.org>
> To: "Alfredo Deza" <adeza@redhat.com>
> Cc: "Ceph Development" <ceph-devel@vger.kernel.org>
> Sent: Sunday, July 19, 2015 12:56:12 PM
> Subject: pulpito slowness
> 
> Hi Alfredo,
> 
> After installing pulpito and run from sources with:
> 
>         virtualenv ./virtualenv
>         source ./virtualenv/bin/activate
>         pip install -r requirements.txt
>         python run.py &
> 
> I run a rados suite with 40 workers and 218 jobs. All is well except a
> slowness from pulpito that I don't quite understand. It takes 9 seconds to
> load although the load average of the machine is low, the CPU are not all
> busy, there is plenty of free ram.

There are pieces of the setup that might be causing this. Pulpito on its own doesn't do much, it is stateless
and just serves HTML.

I would look into paddles (pulpito feeds from it) and see how that is doing. Ideally, paddles would be setup with
PostgreSQL as well, I remember that at some point the queries became very complex in paddles and some investigation
was done to improve their speed.



> 
> ubuntu@teuthology:~$ curl
> http://localhost:8081/ubuntu-2015-07-19_15:57:13-rados-hammer---basic-openstack/
> > /dev/null  % Total    % Received % Xferd  Average Speed   Time    Time
> Time  Current
>                                  Dload  Upload   Total   Spent    Left  Speed
> 100  391k  100  391k    0     0  42774      0  0:00:09  0:00:09 --:--:--
> 96305
> 
> Do you have an idea of the reason for this slowness ?
> 
> Cheers
> 
> --
> Loïc Dachary, Artisan Logiciel Libre
> 
> 
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