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Posted to issues@flink.apache.org by "sunjincheng (Jira)" <ji...@apache.org> on 2020/05/31 03:31:00 UTC

[jira] [Created] (FLINK-18041) Make a little bit improvement for DEFAULT_FLUSH_MAX_SIZE and DEFAULT_FLUSH_INTERVAL_MILLS of AbstractJdbcOutputFormat

sunjincheng created FLINK-18041:
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             Summary: Make a little bit improvement for DEFAULT_FLUSH_MAX_SIZE and DEFAULT_FLUSH_INTERVAL_MILLS of AbstractJdbcOutputFormat
                 Key: FLINK-18041
                 URL: https://issues.apache.org/jira/browse/FLINK-18041
             Project: Flink
          Issue Type: Improvement
          Components: Connectors / JDBC
    Affects Versions: 1.10.1, 1.10.0
            Reporter: sunjincheng


Recently, when some users are learning Flink, they encounter a big problem, that is, why Flink can't write to MySQL in real time.

The root cause is that there is little data when testing and the default value for DEFAULT_FLUSH_MAX_SIZE is 5000,  and DEFAULT_FLUSH_INTERVAL_MILLS is 0.

[https://github.com/apache/flink/blob/release-1.10/flink-connectors/flink-jdbc/src/main/java/org/apache/flink/api/java/io/jdbc/AbstractJDBCOutputFormat.java]

So, I think would be great to make a little bit improvement  for the default value. Such as 

DEFAULT_FLUSH_MAX_SIZE = 1. 

What do you think? 



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