[jira] [Created] (KAFKA-3868) New producer metric record-size-avg does not provide average record size as advertised

[Ewen Cheslack-Postava (JIRA)]

Ewen Cheslack-Postava created KAFKA-3868:
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             Summary: New producer metric record-size-avg does not provide 
average record size as advertised
                 Key: KAFKA-3868
                 URL: https://issues.apache.org/jira/browse/KAFKA-3868
             Project: Kafka
          Issue Type: Bug
          Components: producer 
    Affects Versions: 0.10.0.0
            Reporter: Ewen Cheslack-Postava
            Assignee: Jun Rao


The metrics for record size are setup as such:

{code}
            this.maxRecordSizeSensor = metrics.sensor("record-size-max");
            m = metrics.metricName("record-size-max", metricGrpName, "The 
maximum record size");
            this.maxRecordSizeSensor.add(m, new Max());
            m = metrics.metricName("record-size-avg", metricGrpName, "The 
average record size");
            this.maxRecordSizeSensor.add(m, new Avg());
{code}

and then the values are recorded:

{code}
this.maxRecordSizeSensor.record(batch.maxRecordSize, now);
{code}

So the value provided by record-size-avg is the average maximum record size 
with the average computed by batch, not the average size of the records being 
sent as is suggested by "The average record size". We have all the necessary 
info needed to compute the metric, but it needs to be done separately from 
recording the batch.maxRecordSize values.



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