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https://issues.apache.org/jira/browse/FLINK-6365?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16093358#comment-16093358
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Tzu-Li (Gordon) Tai commented on FLINK-6365:
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[~phoenixjiangnan] [~StephanEwen]
As discussed in the original ML, I am +1 to increasing {{SHARD_GETRECORDS_MAX}}
to the default that AWS SDKs are using (10000). The current 500 is just too low
for the usual cases and out-of-the-box doesn't provide good throughput.
However, I would still suggest not touching {{SHARD_GETRECORDS_INTERVAL}}. One
main reason is that this directly affects user-perceived behaviour of the
consumer. I also am not too fond of the idea that by default we have this sleep
interval between fetches. I'm not strongly against this, though, and am open to
change it.
> Adapt default values of the Kinesis connector
> ---------------------------------------------
>
> Key: FLINK-6365
> URL: https://issues.apache.org/jira/browse/FLINK-6365
> Project: Flink
> Issue Type: Improvement
> Components: Kinesis Connector
> Affects Versions: 1.2.0
> Reporter: Steffen Hausmann
> Assignee: Bowen Li
> Priority: Minor
> Fix For: 1.4.0, 1.3.2
>
>
> As discussed in
> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Kinesis-connector-SHARD-GETRECORDS-MAX-default-value-td12332.html,
> it seems reasonable to change the default values of the Kinesis connector to
> follow KCL’s default settings. I suggest to adapt at least the values for
> SHARD_GETRECORDS_MAX and SHARD_GETRECORDS_INTERVAL_MILLIS.
> As a Kinesis shard is currently limited to 5 get operations per second, you
> can observe high ReadProvisionedThroughputExceeded rates with the current
> default value for SHARD_GETRECORDS_INTERVAL_MILLIS of 0; it seem reasonable
> to increase it to 200. As it's described in the email thread, it seems
> furthermore desirable to increase the default value for SHARD_GETRECORDS_MAX
> to 10000.
> The values that are used by the KCL can be found here:
> https://github.com/awslabs/amazon-kinesis-client/blob/master/src/main/java/com/amazonaws/services/kinesis/clientlibrary/lib/worker/KinesisClientLibConfiguration.java
> Thanks for looking into this!
> Steffen
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