Till Rohrmann created FLINK-17970:
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Summary: Increase default value of IO pool executor to 4 * #cores
Key: FLINK-17970
URL: https://issues.apache.org/jira/browse/FLINK-17970
Project: Flink
Issue Type: Improvement
Components: Runtime / Coordination
Affects Versions: 1.11.0
Reporter: Till Rohrmann
Assignee: Till Rohrmann
Fix For: 1.11.0
Currently, the default value of
{{ClusterOptions.CLUSTER_IO_EXECUTOR_POOL_SIZE}} is #cores. I propose to
increase it to 4 * #cores to support a higher load of blocking IO operations.
Moreover, I propose to use a cached thread pool instead of a fixed thread pool.
That way, only those use cases which have high IO load will actually occupy the
required resources to start more threads.
Last but not least, I propose to change the config option name from
{{cluster.io-executor.pool-size}} to {{cluster.io-pool.size}} which is a bit
shorter.
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