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Posted to user@flink.apache.org by Piper Piper <pi...@gmail.com> on 2020/09/16 22:22:40 UTC
Maximum query and refresh rate for metrics from REST API
Hello,
What is the recommended way to get metrics (such as CPU, Memory and user
defined meters and gauges) at the highest frequency rate (i.e. with the
highest/fastest refresh rate) such as every 500 milliseconds or less?
Is there any rate limiting by default on querying the REST API for metrics?
I am querying the REST API every second but not seeing any change in the
CPU load for every second, so I was wondering if there is any maximum
frequency at which I can query it.
Thanks,
Piper
Re: Maximum query and refresh rate for metrics from REST API
Posted by Piper Piper <pi...@gmail.com>.
Thank you, Chesnay!
On Thu, Sep 17, 2020, 3:59 AM Chesnay Schepler <ch...@apache.org> wrote:
> By default metrics are only updated every 10 seconds; this can be
> controlled via
>
> https://ci.apache.org/projects/flink/flink-docs-release-1.11/ops/config.html#metrics-fetcher-update-interval
> .
>
> On 9/17/2020 12:22 AM, Piper Piper wrote:
> > Hello,
> >
> > What is the recommended way to get metrics (such as CPU, Memory and
> > user defined meters and gauges) at the highest frequency rate (i.e.
> > with the highest/fastest refresh rate) such as every 500 milliseconds
> > or less?
> >
> > Is there any rate limiting by default on querying the REST API for
> > metrics? I am querying the REST API every second but not seeing any
> > change in the CPU load for every second, so I was wondering if there
> > is any maximum frequency at which I can query it.
> >
> > Thanks,
> >
> > Piper
>
>
>
Re: Maximum query and refresh rate for metrics from REST API
Posted by Chesnay Schepler <ch...@apache.org>.
By default metrics are only updated every 10 seconds; this can be
controlled via
https://ci.apache.org/projects/flink/flink-docs-release-1.11/ops/config.html#metrics-fetcher-update-interval.
On 9/17/2020 12:22 AM, Piper Piper wrote:
> Hello,
>
> What is the recommended way to get metrics (such as CPU, Memory and
> user defined meters and gauges) at the highest frequency rate (i.e.
> with the highest/fastest refresh rate) such as every 500 milliseconds
> or less?
>
> Is there any rate limiting by default on querying the REST API for
> metrics? I am querying the REST API every second but not seeing any
> change in the CPU load for every second, so I was wondering if there
> is any maximum frequency at which I can query it.
>
> Thanks,
>
> Piper