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KAFKA-3565; Add documentation to warn user about the potential messag… 

…e throughput drop due to the addition of timestamp field.

Author: Jiangjie Qin <becket.qin@gmail.com>

Reviewers: Ismael Juma <ismael@juma.me.uk>, Jun Rao <junrao@gmail.com>

Closes #1372 from becketqin/KAFKA-3565
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Jiangjie Qin 2016-05-15 09:04:21 -07:00 committed by Jun Rao
parent 13130139ff
commit 7ded19a29e
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docs/upgrade.html
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@ -63,6 +63,13 @@ work with 0.10.0.x brokers. Therefore, 0.9.0.0 clients should be upgraded to 0.9
message format version. Otherwise consumers before 0.10.0.0 might break. In particular, after the message format
is set to 0.10.0, one should not change it back to an earlier format as it may break consumers on versions before 0.10.0.0.
</p>
<p>
<b>Note:</b> Due to the additional timestamp introduced in each message, producers sending small messages may see a
message throughput degradation because of the increased overhead. When receiving compressed messages, 0.10.0
brokers avoid recompressing the messages, which in general reduces the latency and improves the throughput. In
certain cases, this may reduce the batching size on the producer, which could lead to worse throughput. If this
happens, users can tune linger.ms and batch.size of the producer for better throughput.
</p>
<h5><a id="upgrade_10_breaking" href="#upgrade_10_breaking">Potential breaking changes in 0.10.0.0</a></h5>
<ul>