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This page is meant as a template for writing a KIP. To create a KIP choose Tools->Copy on this page and modify with your content and replace the heading with the next KIP number and a description of your issue. Replace anything in italics with your own description.

Status

Current state: Under Discussion

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JIRA: here [Change the link from KAFKA-1 to your own ticket]

Motivation

The main motivation is to have a clear metric (in spite of the OS) to see when the produce requests become "async" .In a normal situation the produce requests will be written to disk via teh lib->syscall->etc.., as we know this will end up in a memory page (dirty page from now on)

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Public Interfaces

• Monitoring

Proposed Changes

Describe the new thing you want to do in appropriate detail. This may be fairly extensive and have large subsections of its own. Or it may be a few sentences. Use judgement based on the scope of the change.

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object SegmentAppendStats {
  private val metricsGroup = new KafkaMetricsGroup(SegmentAppendStats.getClass)
  val SegmentAppendTimer: Timer = metricsGroup.newTimer("SegmentAppendRateAndTimeMs", TimeUnit.MILLISECONDS, TimeUnit.SECONDS)
}

Compatibility, Deprecation, and Migration Plan

• I need confirmation if tracking this metric could have a performance impact (Thanks in advance)

Test Plan

If the KIP is accepted I can easily test the scenario producing records, checking the new metric before and after (sync vs async) writes

I can play using the dirty_ratio and background_dirty_radio values.

Rejected Alternatives

If there are alternative ways of accomplishing the same thing, what were they? The purpose of this section is to motivate why the design is the way it is and not some other way.