[FLINK-30971][table-runtime] Modify the default value of parameter 'table.exec.local-hash-agg.adaptive.sampling-threshold'

[swuferhong]

What is the purpose of the change

In our test environment, we set the default parallelism to 1 and got the most appropriate default value of parameter table.exec.local-hash-agg.adaptive.sampling-threshold is 5000000. However, for these batch jobs with high parallelism in produce environment, the amount of data in single parallelism is almost less than 5000000. Therefore, after testing, we found that set to 500000 can get better results.

Brief change log

Modify the default value of table.exec.local-hash-agg.adaptive.sampling-threshold.

Verifying this change

no test.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): no
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? no

[flinkbot]

CI report:

• 17d8224 Azure: SUCCESS

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[swuferhong]

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[godfreyhe]

LGTM