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Posted to dev@kafka.apache.org by "Colin McCabe (Jira)" <ji...@apache.org> on 2019/12/11 17:35:00 UTC

[jira] [Created] (KAFKA-9292) KIP-551: Expose disk read and write metrics

Colin McCabe created KAFKA-9292:
-----------------------------------

             Summary: KIP-551: Expose disk read and write metrics
                 Key: KAFKA-9292
                 URL: https://issues.apache.org/jira/browse/KAFKA-9292
             Project: Kafka
          Issue Type: Improvement
            Reporter: Colin McCabe
            Assignee: Colin McCabe


It's often helpful to know how many bytes Kafka is reading and writing from the disk.  The reason is because when disk access is required, there may be some impact on latency and bandwidth.  We currently don't have a metric that measures this directly.  It would be useful to add one.

See https://cwiki.apache.org/confluence/display/KAFKA/KIP-551%3A+Expose+disk+read+and+write+metrics




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Re: [jira] [Created] (KAFKA-9292) KIP-551: Expose disk read and write metrics

Posted by Sönke Liebau <so...@opencore.com.INVALID>.
Hi Colin,

thanks for the KIP, sounds like a useful addition to me.

I considered suggesting also reading the rchar property to allow
getting an approximation of cache hit ratio, but after some reading it
appear to be not as simple as that :)

Best regards,
Sönke

On Wed, 11 Dec 2019 at 18:35, Colin McCabe (Jira) <ji...@apache.org> wrote:
>
> Colin McCabe created KAFKA-9292:
> -----------------------------------
>
>              Summary: KIP-551: Expose disk read and write metrics
>                  Key: KAFKA-9292
>                  URL: https://issues.apache.org/jira/browse/KAFKA-9292
>              Project: Kafka
>           Issue Type: Improvement
>             Reporter: Colin McCabe
>             Assignee: Colin McCabe
>
>
> It's often helpful to know how many bytes Kafka is reading and writing from the disk.  The reason is because when disk access is required, there may be some impact on latency and bandwidth.  We currently don't have a metric that measures this directly.  It would be useful to add one.
>
> See https://cwiki.apache.org/confluence/display/KAFKA/KIP-551%3A+Expose+disk+read+and+write+metrics
>
>
>
>
> --
> This message was sent by Atlassian Jira
> (v8.3.4#803005)



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