CPU load at idle

[Veiko Kukk <ve...@gmail.com>]

Hi

ATS 7.1.2, Centos 7.7.
I'm seeing 15-16% CPU load while there is no traffic at all.
proxy.process.cache.bytes_used 23934931615744
proxy.process.cache.bytes_total 23935065833472

Is that normal?

Veiko

Re: CPU load at idle

[Susan Hinrichs <sh...@verizonmedia.com>]

Clicking through to the description of the poll_timeout setting gives you a
better description of what is going on.
https://docs.trafficserver.apache.org/en/latest/admin-guide/files/records.config.en.html#proxy-config-net-poll-timeout

If your poll is set too low, your threads will spend very little time
blocking in the poll call, and most of the time spinning between poll
calls.

How are you measuring your CPU load?  Total %CPU over all the CPUs on your
system (e.g. %CPU at the top of your "top" display) or %CPU per computation
unit (e.g. %CPU for your traffic_server process in "top").

On an idle Centos7 box, I see top's reporting of CPU utilization for
traffic_server reported by top at 7.6% but total machine CPU at 0.2%

On Wed, Dec 18, 2019 at 3:37 AM Veiko Kukk <ve...@gmail.com> wrote:

> Hi
>
> Before I try anything, I need to understand what it means.
> What does this option do? What polling? net indicates it has something
> to do with network, but what does it poll on network?
>
> Veiko
>
> On Sun, 15 Dec 2019 at 20:25, Shu Kit Chan <ch...@gmail.com> wrote:
> >
> > Perhaps try this out? -
> >
> https://docs.trafficserver.apache.org/en/latest/admin-guide/performance/index.en.html#polling-timeout
> >
> > On Fri, Dec 13, 2019 at 6:07 AM Veiko Kukk <ve...@gmail.com> wrote:
> > >
> > > Hi
> > >
> > > ATS 7.1.2, Centos 7.7.
> > > I'm seeing 15-16% CPU load while there is no traffic at all.
> > > proxy.process.cache.bytes_used 23934931615744
> > > proxy.process.cache.bytes_total 23935065833472
> > >
> > > Is that normal?
> > >
> > > Veiko
>

Re: CPU load at idle

[Veiko Kukk <ve...@gmail.com>]

Hi

Before I try anything, I need to understand what it means.
What does this option do? What polling? net indicates it has something
to do with network, but what does it poll on network?

Veiko

On Sun, 15 Dec 2019 at 20:25, Shu Kit Chan <ch...@gmail.com> wrote:
>
> Perhaps try this out? -
> https://docs.trafficserver.apache.org/en/latest/admin-guide/performance/index.en.html#polling-timeout
>
> On Fri, Dec 13, 2019 at 6:07 AM Veiko Kukk <ve...@gmail.com> wrote:
> >
> > Hi
> >
> > ATS 7.1.2, Centos 7.7.
> > I'm seeing 15-16% CPU load while there is no traffic at all.
> > proxy.process.cache.bytes_used 23934931615744
> > proxy.process.cache.bytes_total 23935065833472
> >
> > Is that normal?
> >
> > Veiko

Re: CPU load at idle

[Shu Kit Chan <ch...@gmail.com>]

Perhaps try this out? -
https://docs.trafficserver.apache.org/en/latest/admin-guide/performance/index.en.html#polling-timeout

On Fri, Dec 13, 2019 at 6:07 AM Veiko Kukk <ve...@gmail.com> wrote:
>
> Hi
>
> ATS 7.1.2, Centos 7.7.
> I'm seeing 15-16% CPU load while there is no traffic at all.
> proxy.process.cache.bytes_used 23934931615744
> proxy.process.cache.bytes_total 23935065833472
>
> Is that normal?
>
> Veiko